Gregory is an adult male green lizard with dark blue and light blue spots. His outer eye area is dark brown and inner area is light brown. He has blue lips.
According to the model sheets, he is roughly 6 ft tall.
He wears a light blue button-down dress shirt, a green and grey plaid necktie, a button-down brown business jacket with two front pockets, a black belt, dark blue dress pants, and a pair of grey sneakers.
Gregory is an uptight, stubborn, sophisticated, and somewhat pretentious lizard who "only watches foreign films".
He, like the other dads, is very protective of Hollyhock and is a loving father. He does not like BoJack but has good reason to feel that way.
BoJack considers Gregory "impossible" to deal with because he says Gregory "doesn't like foreign movies, [he] likes foreign films!"
According to Hollyhock, Greg seemed to also give her some encouraging advice every now and then.
He and the other dads sometimes communicate in a "Dad Speak" with the intention that people outside of the relationship (including Hollyhock) wouldn't be able to understand it.
However, unbeknownst to the dads, Hollyhock understands what they're saying perfectly well.
They live in Wichita, Kansas.
Cupe and the other dads are mentioned numerous times throughout Season 4 by Hollyhock.
They make their first appearance in Lovin that cali lifestyle!!, when they travel to L.A. after Hollyhock accidentally overdoses on amphetamines (later found out to be caused by Beatrice putting weight loss supplements in Hollyhock's coffee).
They blame BoJack and refuse to ever let him see her again.
In What Time Is It Right Now, BoJack travels to their home in Wichita, Kansas. After begging them to hear him out, he explains how he discovered he isn’t actually Hollyhock’s biological father—his father Butterscotch is.
He also found out Hollyhock's mother is his family's former maid, Henrietta Platchkey, and he wanted to give Hollyhock her phone number.
They agree to tell her, but still tell BoJack to leave.
The dads seem to have allowed Hollyhock and BoJack to talk again, as Hollyhock and BoJack continue to have a distant sibling relationship afterward. Hollyhock even visits him in Ancient History.
In Intermediate Scene Study w/ BoJack Horseman, Hollyhock mentions three of her fathers were disappointed that she quit when she quit rugby, while the other five were relieved to hear she quit the team. It is unknown as to which fathers were relived and who were disappointed.