Ratchet

Ratchet is a canon character from the Transformers franchise.

The Family (2011 - )
Ratchet is Optimus's bondmate, and father to Ironhide, Arcee and Bumblebee. Elita-One is his twin sister.

He is fully trained as a medic, but when Ironhide was born, Ratchet and Optimus decided that Ratchet would be the one to stay at home with their family. He may go back to work once Bumblebee is old enough to be left home alone.

Ratchet is also much the same in personality. He is a bit bad-tempered, and is not known for his patience. He is often annoyed by his children, but loves them nonetheless.

According to everyone, Ratchet is an excellent cook.