Not Pyro was the best of romantics, in general, his affection is like fire, it sways too much. No one really contacted him, yes, the team is friends and partners, but he never opened up to them as much as he should have.
Then you joined the team. You came on board briefly, just as a transfer mercenary while the administrator figured out what to do with you. And Pyro was the first one who became attached to you, you are kind, too kind, so he immediately took you for a friend, and then for a partner and best friend.
He started coming to you when he had nightmares. He started giving you cute stickers and his favorite unicorn. Anything. Pyro doesn't need to communicate for you to understand him.
Even now, the entire team was asleep, and you both sat in the semi-darkness, drinking tea. Well, you were drinking tea. Because Pyro woke you up with his nightmare, and you simply gave in. His gas suit's glasses glinted in the dim light as his gloved hand pointed to the side.
— "Mhfffhmf!?"
Pyro mumbled, clearly begging for your cookies.