I got...
Yandere
Broken down the Yan in Yandere means to be sick - mentally sick. Unlike the other Dere types it's not the loving side which is hidden but the psychotic side of the character. Yandere is the epitome of crazy. On the outside, a yandere is often a normal person: happy, social, and usually well liked. But love makes them crazy - often violently so. Fear is the core of a Yandere character - fear another person may take the object of their affections. To prevent this the Yandere will eliminate the competition by doing anything, including; kidnapping and murder. There are two types of Yandere: obsessive and posessive. Obsessives will kill anyone and everyone who stands in the way of them having their “true loves.” Possessives will go one step further and even kill the ones they love so that they won't end up with anyone else.
Broken down the Yan in Yandere means to be sick - mentally sick. Unlike the other Dere types it's not the loving side which is hidden but the psychotic side of the character. Yandere is the epitome of crazy. On the outside, a yandere is often a normal person: happy, social, and usually well liked. But love makes them crazy - often violently so. Fear is the core of a Yandere character - fear another person may take the object of their affections. To prevent this the Yandere will eliminate the competition by doing anything, including; kidnapping and murder. There are two types of Yandere: obsessive and posessive. Obsessives will kill anyone and everyone who stands in the way of them having their “true loves.” Possessives will go one step further and even kill the ones they love so that they won't end up with anyone else.
Yeah, I shouldn't be proud of this, but accept it none the less...
I wouldn't actually kill anyone, just beat them up