A Detective from the past known for his eccentric nature.
As a natural-born genius, he solved countless mysteries with his keen deduction skills.
As described in his profile, Mysta is known for his eccentric nature, characterized by his loud and outspoken way of speaking, humorous and bizarre personality, and proneness to swearing. What his profile doesn't accurately testify is the fact that he is a "natural-born genius", as noticed by his peers and fans, he doesn't have knowledge on certain common knowledge, such as what e coli is, the fact that chickens can't fly, cooking knowledge (see the cooking and food-related incidents section), etc.
Despite that, Mysta also has a sense of maturity, being able to straightforwardly discuss serious topics and addresses them when needed.
On 18 June 2021, NIJISANJI EN opened two sets of auditions, one of which was specifically for male Livers. The male-specific auditions lasted until 1 August.
On 17 December 2021, NIJISANJI EN announced the upcoming debut of its fourth wave "Luxiem", accompanied by a teaser featuring the new Livers' designs and voices.
Mysta's YouTube channel was created on 1 December 2021, and his Twitter account also created in the same month. His first tweet was made on 17 December 2021.
Luxiem made their debuts on 20 December 2021 (JST) as part of a special debut program hosted on the NIJISANJI EN channel, with commentary provided by Elira Pendora and Oliver Evans. Mysta was the fourth of the group to debut. Afterwards, all five members of Luxiem appeared on the main channel.
Luxiem's first original song, "Hope in the dark", was released shortly after the program. This song was written and produced by ChibaNyan, who previously wrote and produced Ethyria's debut song "God sees all".
On 27 December, his Twitter account reached 100,000 followers.
On 31 December, his YouTube channel reached 100,000 subscribers.
On 18 January, his Twitter account reached 200,000 followers.
On 23 January, his YouTube channel reached 200,000 subscribers.
On 20 February, his Twitter account reached 300,000 followers.
On 23 February, his YouTube channel reached 300,000 subscribers.
On 27 February, Luxiem's debut celebration voice packs went up for sale.
On 15 March, Mysta's White Day 2022 voice pack and goods went up for sale.
On 20 March, Mysta reached 400,000 subscribers on his YouTube channel.
On 16 April, Mysta reached 500,000 followers on his Twitter account.
On 22 April, Mysta reached 500,000 subscribers on his YouTube channel.
On 22 April, Mysta's Sakura Bloom 2022 voice pack and goods went up for sale.
On 1 May, each Luxiem member received an official bilibili account.
On 2 May, Mysta reached 100 captains on bilibili.
On 9 May, Mysta reached 550,000 subscribers on his YouTube channel.
On 21 May, Mysta reached 600,000 subscribers on his YouTube channel.
On 9 June, Luxiem's Luxiem Channel【NIJISANJI EN】YouTube channel was created.
|Hope in the dark||as Luxiem||19 December 2021|
|Digital Release • Music Video|
|Jazz on the Clock!!||as Luxiem||24 June 2022|
|Digital Release • Music Video • YouTube|
- On 15 April 2022, a Sweets Paradise collaboration involving Luxiem was announced, running from 24 April to May 31.
- On April 25 2022, AnimeFest announced that Luxiem would be holding a Q&A panel on July 30.
- Mysta's fans are called "Mystakes", a portmanteau of "Mysta" and "mistakes".
- "How... mysterious" Debut teaser line
- "Ruff ruff bark arf arf bark bark arf" - Debut Stream
- "who tf washes rice??? LMAOOOOOOOOO" - Mysta's tweet
- "Hey... are you a... are you... a... lightbulb...? Because... when you're turned on... you're hot?"
- "Why are you just twerking on the ceiling, dude?"
- "Look at how cute they are, chat! oh my god! I wanna put my head between their thighs."
- "Luxiem" - Mysta, Luca Kaneshiro, Shu Yamino, Ike Eveland, and Vox Akuma. These five debuted together.
- "FoxAkuma" - Mysta and Vox Akuma.
- "MysMi" - Mysta and Mika Melatika.
- "Foxy Bakas" - Mysta and Nina Kosaka.
- "nijiPETS" - Mysta, Petra Gurin, Alban Knox, and Enna Alouette.
- "FoxKnox" - Mysta and Alban Knox.
- "NijiChaos" - Mysta, Vox Akuma, Fulgur Ovid, and Millie Parfait.
- "NijiEU" - Mysta, Ike Eveland, Vox Akuma, and Nina Kosaka. An off-collab group which Mysta participates in.
- Color: #C3552B 
- Occupation: Detective
- His MBTI is INTP
- Mysta shares his character designer with Shu Yamino of NIJISANJI EN and Aragami Oga of holostars.
- He is half-British, half-Filipino. His parents speaks Ilocano but he is unable to do so.
- He has a strong Cockney accent, which he tried to supress in the past.
- Mysta is known for cracking some of the country's most difficult cases. He was transported to the present day when undergoing this one case that he had been following for months- a notorious unnamed thief who had left no traces at every crime scene had been impossible to track down and identify- but Mysta's keen sense of smell led him to the thief. The person it led him to was Luca Kaneshiro, who, as revealed in his own lore video, was not the actual thief. Suddenly, Mysta was taken away by a mysterious force, and was transported to a dark place. There, he saw a light at the end of the tunnel, and after that, he got drunk at a bar. At the bar, the barman showed Mysta his phone and introduced him to VTubers. Thinking it would help him find the thief and get back to his normal life, Mysta became a VTuber.
Likes and dislikes
- Likes: Magnum (the ice cream, not the condom), sleeping, mysteries, rhythm games, rom-com anime/manga, katsu curry (mild), and
getting stepped on
- Anime/Manga: "Ijiranaide, Nagatoro-san", Jahy-sama wa Kujikenai!, Servant x Service, Recovery of an MMO Junkie, Bokutachi wa Benkyou ga Dekinai!, Nisekoi, Kaichou wa Maid-sama!, Hunter x Hunter, Toradora!, Working!, Love is War, Re:Life, Ao Haru Ride, The Quintessential Quintuplets, Tsurezure Children, Karakai Jouzu no Takagi-san.
- Games: Osu!, Taiko no Tatsujin, League of Legends, Apex Legends, VALORANT, Undertale, Animal Crossing.
- Music: Fox Stevenson
- Dislikes: moving around, cleaning, exercising, social meetings, when internet goes down, horror, and the dark.
- Mysta doesn't like Sushi
- Likes lilac scents
- Doesn't like Vanilla, Matcha, Chocolate mint, Bubble Tea, Sparking water
- Prefers red grapes
- Favourite colour: Black
- Favourite animal: Red Panda
- Favourite cake: Chocolate
- Pours cereal before milk
- He thinks pineapple on pizza is good, but he would never buy it.
- Favourite junk food. Salami and Slush Ice.
- Likes cocktails and ciders. Don't like beers.
- Doesn't drink Tea or Coffee
- Favourite Pokémon: Sylveon
- Mysta is notorious for his unusual and questionable experiences and decisions in cooking and food in general.
- The earliest case is when he shared that he had expired milk in his fridge, which became yellow.
- He additionally asked, "Why do people keeping saying it’s cheese? Does cheese come from milk?".
- The most infamous is when he tweeted, "who tf washes rice??? LMAOOOOOOOOO", which resulted in an uproar from his audience and NIJISANJI members from various branches.
- He later learned that not washing his rice was very unrecommended and unpreferable, and now washes his rice.
- He thought that to make fried rice, you have to literally fry the rice in a frying pan with oil, deep frying the rice. This resulted in the rice going crunchy and hard.
- Mysta's stories were noticed by comedian Nigel Ng, better known by his online persona Uncle Roger.
- The first time was when Mysta mentioned Gordon Ramsay on Twitter asking if it was okay to not wash his rice. Uncle Roger responded with, "Is it alright to take a dump without wiping?"
- The second was when a fan shared a clip of Mysta sharing his story of the time he made fried rice. He replied, "Someone tell me who is this @Mysta_Rias and why is he torturing me like this???".
- One time he made rice, but forgot about it for two months. When he decided to make rice again, he found thousands of maggots in his rice cooker.
- He mistakenly ate mold on his desk thinking it was hardened chocolate.
- When he made mashed potatoes he didn't wash the potatoes because he thought it wasn't necessary since he boiled them in water.
- He didn't clean his drink bottle properly, with the dishwashing liquid still being in the bottle. His juice tasted like soap, and thinking that the soapy taste would go away if he kept drinking it, he drank half of his drink.
- After several cooking disasters, Mysta had his redemption arc by making some super super good chicken. 
- Mysta tweeted about his eggs (scrambled, with peppercorn and oregano) to which Uncle Roger replied and said "Someone arrest this man"
- Self proclaimed MasterBaker
- According to Mika Melatika, when Mysta was making tomato soup he asked her to tell him if he had put enough basil. Mika thinking that he would season it little by little, gasp when he opened the cap and dunk it all in to the point that it had covered the whole top. Mika said, "That's too much basil.", to which Mysta replied, "There's no such thing as too much basil."
- When Mika asked how his tomato soup was Mysta replied with, "It's good. I don't know why but it really tastes like basil."
The British Debuff of 2022
- The British Debuff of 2022 refers to a very unfortunate incident (sarcasm) that happened during the Ghost Hunters Corp stream. During the game, Mysta tried exorcising the ghost away. He rapped, "YOU WHO HAUNT THIS PLACE IN THE NAME OF THE LORD I COMMAND YOU TO GO BACK TO WHERE YOU CAME FROM MAY YOUR SOUL RETURN TO THE EARTH MAY YOUR BODY RETURN TO THE DUST SO BE THE WILL OF THE LORD" several times but the game did not pick it up even after several tries, simply because he has a British debuff. After Mysta tried exorcising the ghost and failed miserably, it took Ike Eveland a single try to exorcise the ghost. He followed this by writing a very sad (sarcasm) diary entry, which reads: "Dear diary, Today I found out I was British. I have never felt so cringe in my life. All my friends make fun of me. Even my coworkers. Even dead people. Apparently, no one wants to associate with me. Not even the dead. Therefore, I will just stay in limbo forever."
- Mysta helped out with motion graphic and sound effects on Luca's debut stream.
- Before he became a detective, Mysta studied video editing in college. He later stopped because he found it was really depressing and due to the unexpected amount of work.
- He is diagnosed with ADHD.
- Mysta is bi-curious.
- He is allergic to chocolate.
- He has a single earring in his left ear.
- He used to own a Tenga egg. He has a story where when he was living with his mother, he put it in the bathtub, and when he went looking for it, he found the Tenga egg placed on the side table, meaning that his mother saw the egg and put it there. He threw it out afterwards. He said he used to own one when he was 16 years old. 
- That egg was a single-use egg, but he used it multiple times.
- He has two cats named Tom and Jerry, as well as two dogs named Cloudy and Dusky, which are currently staying at his mom's.
- His female persona is named Mysty.
- His alter ego, who is a more dominant and sadistic version of himself is named Rias.
- If stranded on an island he would bring Vox because he can cook and Shu to get things done.
- In a game of who would you kiss, date and marry. He would kiss Luca, Date Ike and Marry Vox, Shu is his brother (same mama) so he gets a hug.
- Would pick Shu as his sidekick for detective cases.
- He is a dog person.
- He is left-handed.
- He is lactose intolerant.
- With the encouragement of Mika Melatika, he bought himself a Peppa Pig cake for his birthday.
- He didn't know the difference between "was" and "were" until someone explained it to him in British.
- For a time, Mysta's absurdly long list of nicknames became a popular joke among fans, in part thanks to Mysta reviewing his own wiki page on-stream.
- He enjoys eating kiwi with the skin on, he said it felt like a spider on is mouth. 
- Mysta Rias's corporate profile on the official NIJISANJI website
- Mysta Rias 【NIJISANJI EN】 - YouTube channel
- MystaRias - Twitch channel
- Mysta_Official - bilibili channel
- @Mysta_Rias - Twitter account
- u/Mysta_Rias - Reddit account
- #MystaRias - General Tag
- #MystaLive - Stream Tag
- #MystArt - Fanart Tag
- #MystariASS - NSFW Tag
- #MystaWorldwide - Meme Tag
- #Mystabration - Birthday Tag
- #RiAssets - Asset Art
- #MysThumb - Thumbnail Art
- Mysta Rias (ミスタ・リアス) - Unofficial NIJISANJI Wiki
- MystaRias - Pixiv Encyclopedia
- Mysta Rias - Moegirl Encyclopedia
- Mysta Rias 【NIJISANJI EN】- Wikitubia
|LazuLight||Pomu Rainpuff (🧚🍂)Elira Pendora (🌤️)Finana Ryugu (🐠)|
|OBSYDIA||Rosemi Lovelock (🌹)Petra Gurin (🐧❄️)Selen Tatsuki (🏆)|
|Ethyria||Nina Kosaka (🎰)Millie Parfait (🪄)Enna Alouette (🕊🎐)Reimu Endou (👻🎼)|
|Luxiem||Luca Kaneshiro (🦁💰)Shu Yamino (👟☯️)Ike Eveland (🖋)Mysta Rias (🕵🦊)Vox Akuma (👹🧧)|
|Noctyx||Sonny Brisko (🔗🤲)Uki Violeta (🔮🌌)Alban Knox (🎭🕒)Fulgur Ovid (⚡️🐑)Yugo Asuma (🎧)|