The major angels adapted/parodied from The Bible debuting as the main antagonists of these fictions (Abrahamic Religion and Christian Religion) whose were descend to the hell in command of the heaven rulers whose they aren't good in reality (The God and The Council) to eliminate their targets (Adam was done the annual extermination with other exorcist and wants more to punish twice the sinners as he like his "job" to such an extent that he attempted with exorcist to wipe-out the whole hell including Lucifer and Charlie while Gabriel was sent back down to destroy Hell's robotic invaders, especially V1) and have the negative traits (e. g. Adam is rude, sexist, egoist, immature, psychopatic; Gabriel is arrogant, treacherous, ambitious, impetuous)

"Aaaand remember, kids!"