Suu Hifumi

Suu Hifumi is Rentaro's 23rd girlfriend from 100 Girlfriends franchise. She is a numerophile. She compares her love for numbers to how people can be in love with others of the opposite sex or the same sex.

In a similar way to Rentarou, who equally loves all of his girlfriends, she equally loves all of the numbers, and loves to describe the qualities of each number, like 1's sleek & trim form, 2's contrast between the curve and the line, 3's dip and shapely mounds, 4's wonderfully sharp corners, and so on.

Despite being in love with the numbers, she's very bad at math, this is because she thinks that each number has its own identity and feels that humans strip off their identities to turn them into things (like turning 1 plus 1 into 2 instead of 11, according to her, the latter respects the identity of the number 1).

Suu's obsession with purely numbers has led to her becoming oblivious to certain pieces of common knowledge, such as her not knowing that seawater is too salty to safely drink.

Due to her love of numbers she can memorize the prices of goods clearly.