Which ancestor is this? "ancestor" is refers to "student"

...Sensei♥

Bliss you all~♥

Please rest assured...♥

I... I have found a place deep within Trinity... Where no detector can find...♥

There... You and I will be together forever...♥

Live happily...♥

I'm here to save you, okay?♥

Hahaha!

Mika is still the same today

I hate you, Sensei~ This sentence is NG for girls, right?