this would definitely be a season 3 au, and the majority of Ianite’s descent into villainy would take place well before our heroes find themselves in another parallel universe. hundreds of millennia, and eventually she gets tired of being the peace keeper between her brothers. she’s had to stop both of them from destroying the mortal realm- curbing Mianite’s desire to have all mortals bow before him, and ceasing Dianite’s destructive war paths that could topple civilizations. and sure, there’d be a moment of peace after Ianite stepped in and thwarted her siblings, but it would never last. at some point, Mianite or Dianite would forget their sister’s words and encroach onto each other’s territory, thus disrupting the balance yet again.

and at one point, Ianite gets tired. she’s exhausted of having to keep two other gods in line, and she’s tired of watching their mortals get hurt in the process. so, she begins to look for a way to keep everything balanced. permanently. Ianite, for all her composer, is at the end of her rope and just wants peace.

Ianite’s quintessence signature is unique in a way that her brothers isn’t. her quintessence is malleable; so much so that she can easily traverse her brother’s realms without feeling ill. she simply adapts to her environment, adjusts her core essence to match her surroundings and continue on her merry way. this gives her an idea; Dianite and Mianite have proven that they can’t be trusted to keep the peace, can’t possibly understand what it means to make sure everything stays balanced, but she can. instead of remorse or horror, Ianite only feels grim determination as she comes to the conclusion that she must dethrone her brothers and take on the burdens they will leave behind in order to attain her goal.

so, Ianite sits back. she watches as Dianite begins to wreck havoc on the mortal realm, and when Mianite cannot keep him in check, she fakes her sympathy as he pleads for her help. she devises a plan to lure Dianite into the End, and together they’ll put a stop to his devices. Ianite watches on from the side lines as her brothers brawl in her domain, taking refuge on the obsidian monoliths as she shoots Dianite down.

It’s only when she unsheathes her blade afterwards does Mianite realize the trap he’s walked into.

the final battle doesn’t last long- Ianite manages to shoot him in the back, the divine arrow driving deep into him before he escapes. it’s frustrating, but it’s fine, because her efforts were not entirely wasted. when Ianite turns to harvest Dianite’s quintessence for herself, she feels a spark of satisfaction when she sees the fear on his face. Good, she thinks as she carves his heart out to hide somewhere safe, it’s what you deserve.

and of course Dianite’s quintessence changes her. the transition goes well enough, and if she’s being honest, she doesn’t mind the dark scales and talons. the wings are useless for traveling when she can just teleport, but if it makes her more intimidating then so be it. it helps that she doesn’t have to focus on adapting when she enters the nether, and her ability to connect to the denizens of hell will help her in her search for Mianite. the balance is disrupted once again, but she can make it right. she can empty out both scales and ensure true balance, as long as she finds him.

Ianite slowly gets more frenzied in her search as time stretches on. absorbing the additional quintessence has made her attuned to things she shouldn’t be; can almost make out the whispers of darkness and light, is hyper-aware of her shadow that seems to deepen every day, and how the light shies away from her. and it grates on her when our heroes stumble into her realm. Dianite and Mianite’s champions are threats to her, could unravel everything she’s worked so hard for.

however, a champion would serve her well. her representative of the mortal realm, one who could ensure her morals are enforced. someone to help her hunt Mianite, and someone who she can trust.