the weird thing is that by the old lore of the darkin, they being born from and representing a dark aspect of war and conflict be it strife, rage (Atrox and Tryndamere), etc... Evelynn being too born from Despair could have been the last supposed darkin or a new one born from a dark aspect of war that and her true form (the shadow one) has a very big reseamblance to the other darkins, but then they reworked the lore and eve is just a Succubus.