Hirano Kokoro

Her design has her base in her love for ice hockey, most notably in her hockey stick bag (If a viewer/chatter implies the hockey stick bag is anything else, she will whack you with it). She also sports ice skates and a baggy off shoulder hockey jersey. Her design includes a multitude of hair clips, including one "ro2" clip as well as a few bandages plastered on her face and legs for how clumsy she is. She has purple-pink hair with white streaks curled up in twin buns with bangs.

Roro's YouTube channel was created on 27 November 2021, while her Twitter account was created in February 2021.

Roro had her first test stream on 18 December 2021, but did not officially start streaming until a week later, on 23 December. She forgot to save her first ever VOD, which shortly became made into a meme on reddit.

Roro had her official debut on both Twitch and YouTube on 15 March. She announced on her debut that she will focus on streaming on Twitch only. She revealed that she was 18 (eternally) and that the official 1.0 Fan Name was "Classmates", following her school girl theme.

On 8 June, Roro re-debuted with a 2.0 model. Her debut had a lot of mini skits, from a VN-styled flashback skit, revealing her transition from her 1.0 model to her 2.0 model to a sports-style press conference, to which a commercial break was enforced for a short moment before resumption. The end of her debut featured a photoshoot featuring a special profile shot in the style of collectible ice hockey cards and one final skit (or warning) to her viewers on her hockey stick bag. She also announced that her age has been updated to 21 (eternally).

• Roro's fans are known as "Puckies."
• Prior to her redebut, Roro's fans were known as "Classmates."

• "Re:Loop!" along with Valentia Seeker, Penny Puffball, and Rokoko Prufei.
• "PINK" along with kirispica, formed as part of the VSMP elections.
• "Miroro Team" along with Miki Hitsugi‬, formed as part of the "VTUBER COOK-OFF!" Overcooked 2 Tournament‬.

• Roro likes hockey, sushi, coffee and desserts (especially tiramisu), bubble tea, skincare, sleeping in closets, nice scents, and eating microwaved chicken bones.
• Roro dislikes cockroaches, wet socks, rage games, the sun, graphic design (despite currently pursuing a master's degree in graphic design), and the issues that arise after she forgets to wear her retainer for a night.
• Roro's favorite anime and manga series include JoJo's Bizarre Adventure, Haikyu!!, Toradora!, Maid-Sama!, Hunter × Hunter, Jujutsu Kaisen, Katekyō Hitman Reborn!, NANA, Hirunaka no Ryūsei, Oboreru Knife, and Ouran High School Host Club.
• Roro's favorite music artists include Eve, centimillimental, Back Number, Ado, B1A4, SHINee, Super Junior, Crush, Giriboy, 10CM, Loco, All Time Low, 5 Seconds of Summer, My Chemical Romance, The xx, Two Door Cinema Club, Porter Robinson, The Strokes, and Vampire Weekend.
• Roro's favorite genres of games include puzzle games, simulation games, and first-person shooters (excluding Valorant).
• Roro's favorite tea is and her favorite biscuit is malted milk biscuits from ALDI.

• Languages she can speak: fluent English & Mandarin, conversational Korean, and is currently learning Japanese.
• Roro’s viewers often joked that there were other items contained inside the hockey bag since her first model, like concealed guns, etc. which led to the "Just A Hockey Stick" skit.
• As revealed in her 2.0 debut, Roro is always 21, unchanging through the years.
• Roro is teased often on Twitter due to her eating habits of eating microwaved chicken bones.
• Roro desires a NHL/Ice Hockey team partnership as one of her major goals in the future. Her favourite NHL team is the , and her favourite player is of the Avalanche.
• Her hair pin of "ro2" is meant to be a reference to "ro squared," aka "roro," her nickname, and Roro 2.0, the new version of her model.
• She has a special Picrew made for her fans or "Puckies" to design themselves.
• Roro designed and hand packs all the merchandise sold herself.
• Roro does not like it when viewers call her "Hirano," likening it to calling her dad.
• Despite being a founding member of UK-based group Re:Loop!, Roro is not British, but is an Australian living in the UK.
• In addition to her own website, Roro is also the designer of Re:Loop!'s graphics and logo, as well as Penny Puffball's logo.