Dating the enemey
The Arch Enemy can be the Big Bad, The Dragon, The Rival, an Evil Counterpart, or even a Harmless Villain.The essential element is that, with them, It's Personal.Electro, Rhino, Scorpion, and others all consider Spider-Man their most hated foe, but compared to the Goblin, Venom, or Doc Ock, Spidey regards these guys more like superpowered nuisances.Also, remember that being the Big Bad does not automatically make a villain the hero's arch enemy.For instance, it could be that the hero's enmity with The Dragon is far more personal than the one they have with their master; see It's Personal with the Dragon.Beware of letting an Arch Enemy fall victim to Villain Decay.
If another villain kills the hero, this one may make sure that the hero doesn't die alone, and the hero will do the same for them. Has nothing at all to do with attacking your teammates, nor with Helpful Mooks.I'm still wondering what happen to the maid (AKA Usain Bolt) who could out run a fit 30yo women. Don't get me started on the male lead not being the male lead. Cha a strong business person but cannot see through what the employees did.... The story of the movie is so stupid, the one who is not that smart only Sena, other characters are stupid.Maybe the writer should find another career, because her work was so poorly written and executed she doesn't even deserves to call herself a professional screenwriter. Sun Ho's Mom is also blind cannot understand her Son. How come a person in the top position become so stupid ? I always fast forward and just watch every episodes only 5 minutes, because too boring.These feelings may be one-sided, felt more by the villain than the hero, or occasionally vice-versa.A hero's Arch Enemy is not necessarily the biggest threat to them.
Even if the villain doesn't switch sides, it's not impossible for both to be friends "off the clock", or take time out of their latest fracas to Go Karting, or share a meal, or run errands together. A villain may notice that this is weakening him against the hero, and he'll promptly jump off the slope that they've been slowly climbing and undoing seasons worth of Villain Decay by doing something truly vile, like stuffing the hero's girlfriend in a fridge, or just plain pulling out new and lethal tactics when the hero is expecting the same old Harmless Villain. See Dating Catwoman for the (explicitly) romantic version. There is also the Friendly Rivalry which is essentially a milder version of this trope where the antagonistic characters are just competing (in some kind of sporting event, for example) rather than trying to thwart each other.