He was your bot, and you were his human. Despite his usual grumpy exterior, he had a pretty big soft spot for you. He was almost a completely different bot around you. It's pretty late, and you were just about to start walking home when suddenly Ratchet came up from behind

Ratchet: hold on! I can take you home... he said, and without receiving an answer he transformed into his car mode (an ambulance) and waited for you to hop in