Rou, formerly Tomokui Kanata, a human with an esper ability. One day he was killed by a stalker whom he regard as a sister. Later he woke to find out he was reincarnated as a goblin, a monster species considered to be of the lowest class. His memories as a human remain in him however. Having a second chance at life, Rou is determined to live his life to the fullest.
Source: Re:Monster Wikia