Rem is a young succubus, just born. She’s kind of picky when it comes to food, she would only suck the life off of those young, vibrant men. She learned her way of life from her ancestors, and since on a crusade against all living things in the end. So, will she end up the most fearsome devil? Your damage will increase when SLv is up, so as endurance up when MLv up. New skills will unlock as the your level goes up. So choose wisely how you proceed.