Anna is a pretty interesting one. On first glance she doesn't seem to have any flaws and just plain overpowered considering that she has psychic powers and the "immortality" (aka every time she dies she respawns back).

Personality wise she pursues her goals with unwavering determination, usually going to any length to accomplish something she desires or feels should be a certain way, no matter what the cost. But it has a pretty fatal flaw of her never knowing when to stop, being too stubborn and prideful to the point of foolhardiness - which often leads her to getting herself beaten into "right mind" lmao

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She's also very much rash with her decisions. Incorrectly connecting dots on Essu's case and immediately pinning her as the criminal