Originally Posted by
MuljoStpho
Ego. It's the amount of health you have in battles and it's determined based on your endurance and (if I'm not mistaken) a bonus based on your current alpha (but not the other two girls).
So... the ginseng and chlorella (huh, I've been reading that as cholera and wondering why they would have called it that, never heard of chlorella before but apparently that word actually means something too) booster items are kind of redundant with each other. They're a little different, but the difference will only matter to players who pick your name to battle against. Your opponents in battle when you select to fight against another player's profile just simply have their ego set equal to their endurance (no bonus from their girls (they don't get the bonus on other battle stats either, basically the system tends to be weighted in your favor unless you come across a player with the best gear and with a ton of in-game cash invested in pumping up their stats)).
Dark Lord is always locked firmly at low level stats (I think all of the bosses are scaled easier than an average player profile?) and should be a pushover regardless of your stats if you're a higher level than him.