A cat girl Virtual YouTuber and member of Hololive Gamers. She lives with her grandmother and her favorite food is onigiri, which is represented by her personal emoji 🍙.
Character design by Kamioka Shun'ya (initial) and Seramikku (newer outfits).
Okayu has purple eyes and short purple hair with crossed bangs reaching between her eyes and an ahoge, (with an added black hairband with her second costume), and diagonal bangs with blue hair colored inner hair with her 3rd costume. Being a cat girl she has cat ears, a cat tail and a cat mouth, she also wears a black animal collar on her neck. Due to how the camera is placed and her mostly boyish outfits, her rather large breasts can be surprising before the unveil of her third outfit.
Her original outfit consists of cropped black hoodie that shows her midriff with long sleeves that reach past her wrists, long drawstrings and an onigiri print on it, baggy white sweatpants (which she often wears with one leg rolled up and yellow sneakers with a cat print.
Her second outfit is a dark serafuku consisting of a cropped long-sleeved, double-breasted black shirt sailor shirt with white buttons and a white neckerchief, white shorts, black socks with an onigiri print on them and black sneakers.
Her third outfit only consists of an open black jacket worn over a partially unbuttoned white collared dress shirt and a purple neck ribbon and no pants. Her shirt has a couple of button gaps, which reveal that she's apparently not wearing a bra. She also wears a slippers with a dog print on it; matching with Korone's cat print slippers.
Her New Years outfit is a wa maid-ish outfit consisting of a white kosode with the sleeves fading to purple, purple ribbon trim to the sleeves, a purple frilled skirt and a white apron with an onigiri print on the bottom right, secured with an obi-like wrap.
Okayu has a very relaxing and laid back personality, and is well-known for her seductiveness (that often results into her being occasionally depicted as an "bimbo cat girl" archtypes in fan works). However, Okayu is also known to have a "scaredy cat" tendencies, being unable to handle any kind of horror games at all.
She's close friends with Inugami Korone, who she affectionately refers to as "Koro-san" - the loving duo referred to as "OkaKoro". She also owns a pet cat, named Temari (much to the amusement of her viewers, as a cat girl owning a cat gets quite meta).
Her original character designer is Kamioka Shun'ya, who also designed Nijisanji's Shiina Yuika (the pair being known as the Kamioka Family.)