RunawayShark

Now this might just be me, but Aaravos looks a lot like Ziard. If you squint really hard, I suppose. A similarity they share is that they are the first Dark Mages of their species, but their personalities are opposite; Aaravos is cruel and deceiving, Ziard is shown to be compassionate and a genuinely nice person.

Leola and Claudia are alike in many ways, from the magenta fade in their hair (temporary for Claudia) to them both being the only characters confirmed to have ASD (Autism). In physicality, it's mainly the hair and similar eye shape. Personality wise, Claudia exhibits a goofiness akin to Leola's own, but she is twisted and too much the opposite to be considered identical to Leola anymore (at least on the surface).

I surely don't need to point out similarities here. Surely. Literally everything about the Merciful One is identical to Sarai. They look like the same person, I think we all saw that. Again, opposites. TMO is willing to grant mercy, however it's whatever mercy appeases to the Order. If that means offering a denying father to die with his child, then that's the mercy that must be delivered. Sarai was willing to help Queens Neha and Annika, but she did it for Harrow, someone she loved. Not for the "Order" of things, because she genuinely felt bad for Duren and loved Harrow too much to say no. Opposites.

The Stern One looks a lot like Kpp'Ar if you try hard enough. TSO is not, by any means, compassionate, and he is biased towards the Cosmic Order. He makes it as though the Order is his entire lifeblood, his lifeline, and what should be valued the most. He is arrogant. Kpp'Ar at least felt something when Viren said Soren was going to die. He was trustworthy, according to Atticus, and a seemingly relaxed person. The opposite of the Stern One.

The rest of the Cosmic Justice. Unsure of their personalities, but the characters that look like them wouldn't kill a child. At least not directly.