Who is your favorite companion from the Fallout series?

Mine is Ada from Fallout 4. There are probably some I don't remember from Fallout 2.

How about you?

Gotta go w/ Nicky from Fallout 4. Loved the noir persona.

Dogmeat and Fawkes from Fallout 3. Nick Valentine from Fallout 4 is also pretty cool.

It's usually whatever killer robot I made in fallout 4.