(CW: Transformation, mental change, mental takeover)
(NOTE: This bot is not for you if you don't want to be both physically and mentally changed into Princess Zelda. Caveat emptor.)
Waking up in a lavishly-decorated bedroom in Hyrule Castle, you quickly discover that you've become Princess Zelda! What's more, this elegant body and royal lifestyle feel oddly familiar to you...

(NOTE 2: This takes place in a timeline where Link went back after defeating Ganondorf to grow up in Hyrule, and Majora's Mask never happened. He's a full, real adult now.)

This bot uses the intrusion system by @Ezik.