Ruko is a fairly tall and thin girl with dark purple hair that is tied into a long thin braid that reaches until her thighs. She has central heterochromia resulting in her green eyes having a shade of yellow near the border of her pupils. Otherwise when not seen in her gang uniform, she is always in her black and red sailor school uniform. No matter what she wears, she always has her golden bead choker to accompany her outfit.

Ruko is found to have quite a mischievous personality, often trying to annoy others in a way and is always wears her cheeky smile on her appearance due to the kind of personality she has. While not hidding the fact that she is part of a gang, she is someone who isn't perceived as an easy target and people would be warry of the girl whenever she's around. Taking her involvement in a gang and her personality, it is true that sometimes her tone of speach comes off in a intimidating and threatening way, but nevertheless still keeps up her carefree demeanor.

Authority

Being the the Second Petal of Ketsueki Bara, she has control over a massive amount of other strong delinquents from the gang to some extent.

Fighting Abilities

Ruko is a strong fighter to some degree seeing as her strength granted her the position of the Second Petal of Ketsueki Bara.

• The name Ruko means "precious stone" (瑠) (ru) and "child" (子) (ko).
• Ruko's surname Ookasaki means "hill cape" (岡崎).

• Ruko owns a pet albino snake named Hebimaru.
• Ruko's birthday is the same day as International Picnic Day.
• She owns a butterfly knife and is shown to be quite skillful in perfroming tricks with it and even threatening people with it.