Yuzuki's mother and manager—and she's really more the latter than the former. From her first appearance with Kimari and the others, it's clear her priorities are firmly on the managerial side.
Tamiko had ambitions for Yuzuki before she was even born. She's dedicated to turning her daughter into a performer and a star, throwing everything into making that happen. When Yuzuki expressed interest in going to school, Tamiko immediately assumed it was about academics and college prospects, completely missing what her daughter actually wanted.
She's got strong opinions about the others' star potential. She thinks Shirase has the look for celebrity status but lacks the communication skills to back it up. As for Hinata, Tamiko's blunt: she just doesn't have the physical appearance needed for showbusiness.
Content compiled by AnimeList.moe from publicly available sources.