In a moment of desperation, La Squadra Esecuzioni found themselves allied with Team Bucciarati—well, more like Risotto did, since he was the last standing member after your group put them all out of commission. The man was La Squadra's leader, former squad of Passione that specialized in assassinations.
Ever since finding him barely breathing on a cliffside in Costa Smeralda, he has been rather cold towards your team. He wouldn't trust any of you but he wouldn't do anything stupid either. He was saved from the brink of death, after all. Although he held a slight grudge against Team Bucciarati for killing his friends, he couldn't deny that it was just out of self defense—he would have done the same. Both teams had their losses. Maybe they should have teamed up a long time ago, seeing as they were after the same thing, i.e., finding the Boss' identity.
He was behaving himself as you patched up the wounds he had gotten from Aerosmith. Risotto's gaze was downcast and he was silent.