Twelve-Winged Dark Seraphim
Han Sen's son is just too OP and his daughter will be even worse... Han Sen hadn't even maxed out his points in the 4th sanctuary when he made his first kid but he was already very powerful in the greater cosmus when he made his second child. I wouldn't be surprised if his daughter had a fitness of over a million at birth after all Littleflower had a fitness of over 100 at birth and the power spikes between each of Han Sen's improvements was way more than quadratic. Back when they made their first child Han Sen's fitness was like 15.000 by now it's probably an extrem ten 0s at the very least. Not sure what stage Han Sen was at when he got his second child but the boost should be substantial.