She is very shy, and is at first scared of the idea of performing in a live concert. She is also the band's costume designer and sews their outfits all by herself.
Her hobbies are reading and playing online games, the latter through which she met her best friend, Ako, who also calls her "Rin-rin".
Rinko is a very talented keyboardist who has played the piano ever since she was 5-years-old, and prior to joining Roselia, had even won in multiple music contests. She started taking piano lessons after her mother took her to watch a concert. However, she stopped participating in contests after she failed during a big one because of stage fright.
She also used to be friends with Rui, and their parents were friends as well. The two used to play their instruments together and would talk just how much they love music. Despite refusing to compete anymore, it is also thanks to Rui that Rinko managed to remember just how much she loves playing the piano.
Rinko has pale skin, and big, slanted violet eyes. She has long black hair styled loosely after a hime cut; heavy bangs across her forehead with straightened sidelocks that reach past her shoulders. Her casual attire is seen as modest with neutral colors and frilly accents.
In her initial outfit, Rinko wears a white buttoned blouse with ruffles sleeves and a frilly collar tied with a black ribbon. She also wears a black knee-length skirt, worn tightened around her waist with gold buttons down the middle and accents.
Socially awkward, Rinko is a shy and asocial girl who was initially too frightened to speak in front of others, let alone perform before them. She has a tendency to stammer when speaking, and usually keeps quiet until she feels comfortable.
When she is set on or passionate about something, she does so with conviction, like piano or online games. Rinko also tends to get very excited about her passions, to the point where when she was explaining how Neo Fantasy Online worked to the other Roselia members, she was speaking in an alarming speed.
A list of characters Rinko interacts with in the game (during Lives and in the dialogues at the end of every game).
Shirokane (白金) means "platinum". Shiro (白) means "white" and Kane（金）means "metal".
Rinko (燐子): Rin (燐) means "phosphorous" (from Greek φωσφόρος, literally "bearer of light") and Ko (子) means "child".
- Rinko types very quickly, to the point where even if she is typing out a long string of text, it'll still fly by.
- She also uses a lot of kaomojis while typing.
- Rinko plays the Fire Wizard class in Neo Fantasy Online, the online game she plays with Ako.
- In the Re:Zero collaboration, her character design was based on Rem.
- She has the same height as Ran, Saaya, Misaki, and Nanami.