I'm gonna try and read one series from each genre/tag/demographic. RIP me.
AKB48, SKE48, NMB48, HKT48, NGT48 (lol), STU48, SDN48, etc
Nicknames and codenames count too. Some of these are only funny to English speakers but aren't to Japanese speakers. A few are puns on Japanese words.
These characters do not experience sexual and/or romantic attraction to others. While usually not stated outright as asexuality, they talk about being incapable of falling in love. Any characters who are on the asexual spectrum...