Sweet, adorkable, creative, ambitious, indecisive, passionate and friendly are words I'd use to describe everyone at Larian.
I don't have a monster to give you, because of my knowledge of D&D monsters isn't the greatest.
For music just listen to Power of Innocence:
https://www.youtube.com/watch?v=SW4qucYwwvQ also Kirill's Divinity Concert:
https://www.youtube.com/watch?v=-dStHe6h_XgFor insight into their history you can watch these three videos:
https://www.youtube.com/watch?v=YZF_cP_oLH4 ,
https://www.youtube.com/watch?v=A_wKAmBEa8Q ,
https://www.youtube.com/watch?v=uKwi_5nePZg .