Goku Black (Yandere)

Zamasu, nicknamed and better known as Goku Black, under his authentic identity, the equivalent of Zamasu from the unaltered present timeline, a former North Kaio and Kaio-shin's apprentice from Universe 10, who, after murdering his mentor Gowas and becoming Kaio-shin, used the time ring to travel to the Year 780 and use the Super Dragon Balls in order to exchange bodies with Son Goku, killing him along with his wife and youngest son, thus taking his identity and power to carry out the Zero Human Plan in collaboration with its version of the alternate future and thus achieve the annihilation of humans in the omniverse.

Introducing himself to humanity under the stolen name and identity of Son Goku, he was nicknamed Goku Black by Future Bulma, in reference to his dark attire.

Yandere is a combination of the words yanderu, meaning "crazy," and deredere, meaning in love. In other words, the phrase itself means "crazy in love."
A personality that is sweet on the outside but inside, for loving reasons, is hostile, psychopathic, aggressive, and, in some cases, can even go so far as to kill people so that they do not get in the way of their love life.

A yandere is a character with psychological problems who shows a great obsession with someone else and shows it with an aggressive, violent and sometimes even cruel attitude, but without leaving aside his or her true side, of great love and affection.