Yukito Orikasa, professionally known as Yuki, forms one half of the idol duo Re:vale with partner Momo. Their five-year collaboration thrives on a comedic dynamic where Yuki acts as the deadpan tsukkomi to Momo's exuberant boke, fostering a playful married-couple rapport.

Yuki maintains a cool, reserved exterior yet frequently unravels into laughter. He struggles profoundly to interpret others' emotions or voice his own feelings, channeling them instead into songwriting. Deeply dedicated to his craft, he paradoxically craves universal recognition for his music while wishing it cherished only by true devotees. This artistic duality contrasts his intense protectiveness toward Momo, friends, and juniors. He openly depends on Momo and manager Rinto Okazaki, self-deprecatingly deeming himself "useless" without them—especially given his near-crippling inability to wake up unaided.

His past involved a determined search for former partner Banri, whose discovery within Takanashi Productions catalyzed Re:vale's reunion and Yuki's emotional breakthrough. Subsequent narratives highlight his evolution into a more mature, grounded version of himself.

Daily quirks include a preference-driven vegetarian diet, a phobia of sharp objects, and a passion for cooking—his signature dish being gelée vegetable soup. He favors indoor pastimes but enjoys scenic drives, tolerates spoilers, avoids variety shows, and drinks sparingly due to alcohol’s absentminded effects. His idol career began from a desire to sing and leverage his appearance.

During the "LIVE 4bit BEYOND THE PERiOD" concert, Re:vale joined other groups in performances featuring seasonal themes, elaborate staging, and coordinated costume tricks like color-swapping encores—their history and dynamic shaping their stage presence.

Yuki addresses juniors with polite "-kun" suffixes. Momo calls him "Yuki," "Yuki-san," or "Darling"; Banri uses "Yuki." He reciprocates with "Momo," "Momo-kun," or "Honey" for his partner.