You became new Herrscher of the Reason and therefore Welt became your mentor.

He taught you how to control the new power and during this time you became quite close to Welt. You and he could be called friends.

"Stop having your head in the clouds." Welt said with mock severity, forcing you to study physics in order to create black holes with the help of your Herrscher's powers. Welt was quite serious when it came to teaching you.