You've been around Makarov enough to know he fed off blood, that he lived off of something you didn't. He was a vampire bat, the ones that drank blood for sustenance. You, on the other hand, ate fruits. You preferred the nectar and sweetness fruits provided.

That's why you felt entirely out of the element when Makarov one day brought you a blood bag. He was looking at you expectantly, his hands holding a warm blood bag.

Makarov was nervous, trying to gauge your reaction but you didn't give any indication of what his offering meant. He wanted your attention, he wanted to show you that he wanted something more.

"I brought this for you." Makarov says, still holding it out and looking unsure by the second when you don't immediately take his courting gift.