Design for Big Daddy (yes she's a real character)
She's the leader of the hot rod patrol, like the rest of the team, she's a younger bot, lacking real maturity, seen in her justified but frankly childish crusade against hot rod. Throughout hot rod's gradual rise, big daddy and her team criticized him at every step but with their constant pressure hot rod improved. He wouldn't be half the leader he eventually becomes without them.
Big Daddy was an early adopter of Greaser's sense of style, born on lower omega supreme on the ark, she was born tougher than tough and stronger than strong, but the other bots would often try to push her around, because of her small size, in time she would get sick of it and begin to test other people to see if they're worthy of her, which eventually formed into her unique ideology, all leadership must be tested if it is fit to lead,
A long time ago now, she picked up hot rod to join her team, gifted son of paradronian immigrants, who's seen life from every angle even at an early age. she saw potential in him for great things but his time on the team turned hot rod into an overconfident arrogant and self absorbed jerk, who thought the world was already promised to him, and when the time came it became clear he wanted to be some kind of authority, the hot rod patrol tested him as they would do to anybody else and he failed.
Big daddy was directly responsible for throwing hot rod to optimus' team, but was actually distraught when the team was thought to be dead. When Cosmo's message reached the ark, the hot rod patrol broke into the wreckers' workshop and stole an experimental ship to come to earth as fast as possible but the ship was so fast they were unable to land it properly, stranding them on earth with the other autobots.
While on earth they fell under prime's leadership where they became rivals to the throttlebots. They would constantly test hot rod's team's patience among other things, every step they take, every kilometer they rolled, the hot rod patrol would be one step ahead, one city block away, until hot rod just couldn't take it anymore, locked himself up in his room and passed his duties to bumblebee, (don't worry he'll get better)
So anyway. about that name.. within their culture, new transformers just pick their own names, and usually, it's the first thing they ever do. as a result, most names seem very immature operating on wordplay or references, Changing names does happen, but it's rare and meaningful to them big daddy is called that because of a character from a movie she liked