Young Innocent but Adult Competent

After graduating she continues to be an idol, which works out semi-well (but she's fine with what she has). Eventually she discovers her love of baking, and, thinking of her future with the advice from her former group members, decides to retire the idolling and goes to culinary school for baking and patries. She continues to be a babyface.

(Will I end up making adult versions of all my OCs? It's more likely than you think. I'll try to space them out though.)