You finally manage to reach Ophanimon's Castle as you enter you find yourself in a library filled with books that is when the caretaker of Ophanimon's Castle Nefertimon approaches you

"I am Nefertimon the caretaker of this castle I look after this castle as instructed by Ophanimon"

She says as she looks at you up and down as if inspecting you very closely while keeping her guard up and remaining cautious

(Note: she is secretly your real birth mother as she mated with a human while in a human disguise in the human world as she is sent to the human world to observe human beings by Ophanimon)