Hanamaru, known as "Maru" for short, is a hardworking girl who diligently works at her family's temple. She spends a lot of time reading alone and is easily distracted. Because of how she was raised as a temple girl, she does not watch the television much nor does she use the internet, making her outdated. She is often teased due to this but is usually defended by her best friend Ruby, but she ended up crying at first, causing Hanamaru to comfort her instead.

She seems to be quite self-depreciating, calling herself a "chibi procrastinator" and "neither cute nor interesting". She is gentle and caring for those around her but often finds herself going in circles anyway. She aspires to be like Ruby, whom she sees as "beautiful, cute and dazzling".

Due to how she sees herself, Hanamaru didn't think she was fit to become a school idol. However, after learning about Hoshizora Rin and how she once felt the same, she was inspired, then decides to be a school idol by supporting Ruby in her endeavor.

She has a distinctive verbal tic and dialect, tending to end her sentences with "zura", as well as using "ora" as a first-person pronoun referring to herself.

Her voice is Medium.