No, but you can infer by definition. Draco even answered you in parantheses as to "who[m]" Leo may have called chula. A little bewildered you didn't catch who chula is on first reference in the VN...
spoiler alert!!
Chula is not refer to anyone, it is not name, its like you would call your beloved "babe"
Remember that Leo had sex with Micha, he probably had some feelings toward bat, wolf could call him that because he wanted to sound flirty? idk man.
However, to answer your questions point blank: Leo call Chase "chula"
:) peace
Ah, I see. Well, you can always add warnings of incoming spoilers/add extra lines of space into your posts. I understand how you feel though; although I do not despise the thought of Leo and Micha being together, despite some in the community prefering otherwise, I just cannot imagine those two having chemistry together other than what almost could have happened in the prequel.