榊原 優里

A lesbian. She's Erika's domestic partner and lover. Because Seiichiro's genes are so regressive she hopes to use his sperm to become pregnant so it can be a baby she and her lover can share.

She doesn't mind sex with Seiichiro because he's so feminine and cute. She asks him to become a regular sexual partner of herself and Erika and even proposes marriage so they can have a legitimate family together./

Her 'favorite number' is 18