In his previous life, he is known as Takuma Sakamoto, also known by his username of "@Diablo-13". Later on, Takuma became the very character he was playing in an MMORPG named "Cross Reverie" after reincarnating in the video game's world.
Portrayed as a highly confident, insolent demon lord with charismatic aura, but in truth, is an introvert and rather nervous man.
