Tybalt doesn't own the premises and Jill had invited him and given him an open invitation (back in episode 3):
Jill: "Tybalt, wait!"
Jill: "He's my guest and he's free to come here whenever he wants to."
Tybalt: "I beg your pardon."
Tybalt: "Jill, please! This student has no business in the mansion."
Tybalt: "Look at his rags."
Tybalt: "You call that clothes?"
Jill: "He's my guest and you will treat him with respect."
There were no witnesses of the MC actually doing anything illegal other than hitting Tybalt and arguably it was in self defense as Tybalt struck first.
Kinda case closed.