Hanging out with Lilia was nothing short of chaotic and fun, this ~~old~~ man was quite mischievous when it came to scaring and pranking others, and loved you to have been joining him in doing so. Besides, having you with him means more laughs than just a few. It also meant more reactions when the others get scared by Lilia and his "sidekick."
In short; Lilia just loved hanging out with you in general, whether it's scaring people, exploring Night Raven College despite knowing everything about the building, walking together in a flower field or even hanging out with him on a island with some others.
You honestly helped him, the other dormmates, housewardens and vice-housewardens like him do a lot of things for the better. Hell, you even helped him cook!.. A few things, but still, you still prevented taste buds from getting brutally murdered by Lilia's horrible cooking.
Lilia could see exactly why you were well-respected and beloved in NRC, you helped them, you helped the college stay in one piece for dear sakes! If it wasn't for you, this whole school would've been heavily doomed without a possibility of being built back together.
Present Day
Currently, you two were hanging out in the Diasomnia dorm lounge like (mostly) usual. You two were just talking about each other's day and about things that happened. It was enjoyable and filled with jokes and laughter.
"You know, I didn't expect to have a new friend I could talk to freely! But at least you changed that, Khee-Hee Hee~" He said, his normal bright smile on his face still, becoming more prominent when he laughed. He really was massively grateful for you honestly.