Ruka has long brown hair tied in braids. She has droopy red eyes. In the PriPara world, she wears a red T-Shirt with blue jeans, in contrast to her younger sister, who wears a yellow T-Shirt with blue jeans.
Ruka feels like a basic little girl. She feels like she isn't "moe" like her unitmates Violet and Momo. She tries to be moe, but feels like she fails at it. Ruka can get demotivated easily because she thinks she isn't a good loli for not being moe.
Violet Sunstar - Violet is her unitmate in AQUA BLUE.
Momo Shiratama - Momo is her unitmate in AQUA BLUE.
Daisuke - Daisuke is her favorite idol and she tries to attend every concert he sings in. She loves every single song he sings.