Frogika is a main character, and the poster girl (president, creator) of the literature club from Croaki Croaki Literature Club. She is also
an amphibian replica of Monika from the original Doki Doki Literature Club game. Frogika is a female green frog with white speckles.
When the protagonist enters the club, he describes Frogika as smart, pretty, athletic as also described in the real DDLC game.
Frogika is a female teenage frog with white speckles. She has no school uniform or hair, obviously. If you want to know Monika's appearance from the DDLC game, it's here: https://doki-doki-literature-club.fandom.com/wiki/Monika#Appearance