Utakane Yotsuko

Yotsuko is a girl who loves to measure everything around her, and she won't be satisfied unless she's measured down to the tiniest detail! She's Shuuji's childhood friend. His grandfather taught her how fun science could be, and she's been devoted to the field ever since. She has a daily routine of measuring her own body in millimeters and adding it to her records every morning. Ask her about her figure and she'll give her most up-to-date measurements without a second thought! She's very good with numbers, but between you and me, she's kinda clumsy.