The Sidekick is a dedicated lover of the Villain.
"Is something on your mind, honey?"
"It's... It's nothing, Villain, really. I'm just..." Sighs and gets quiet for a while. Then shifts with their cheir towards Villain, continuing "I'm just worried about you. The thing you plan to do... I don't want to lose you"
"You won't lose me. I will never leave your side" They look deeply in Sidekick's eyes, soothingly petting their head. "But this is something I have to do for the greater good. And I don't want to hear you question it again. Because I don't want you to get hurt either."
Some of the heroes are actually admiring those two's affection towards eachother. "Damm, Villain maybe is a crazy a##hole but he really knows how to investe in relationship." It looks all sweet and adorable, untill the bubble just blows.
"What do we say about talking back, dear?"
"I'm so sorry. I will try better. I will. I love you so much"
"And what's the other thing we say?"
Sidekick's holding back tears, trembling slightly. ".....Apologising is not enough"
"Mhm, we'll get back to this later. Someone's forgetting the rules"
Sidekick's love confessions are just the way to satisfy possesive Villain.
Of course after witnissing it the heroes try to take Sidekick the f#ck out of there. Well Sidekick has other opinion on that, so they are taken with heroes by force.
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Sidekick turns out to be a broken Whumpee that stopped fighting their Whumper long time ago.