Kenkai

Kenkai is a male saiyan inhabitant of Universe 1. He was born in January of Age 1000. He has died multiple times, the first of which being in Universe 2, Age 2050.

Kenkai had arrived to Earth he sought to destroy it, until he met Toushima and Shinkai. The two were able to help calm him down (for the most part) until he eventually began to care for Earth.

Around Age 1016, Future Kin arrives at the doorstep of Shinkai's house, proclaiming to be the child of her and Kenkai. Toushima, Kenkai, and Shinkai all laugh him off until Kenkai senses his energy, noticing it to be distinctive and similar to his. He then begins to have a strong bond with Future Kin as they train and such.

Eventually Kin's present counterpart is born in Age 1020, however Future Kin stays in the present to further training with Kenkai. Eventually Kenkai learns that he possesses god ki, and proceeds to inform the Universe 1 group. This leads to the realization that Kin and Future Kin also may possess god ki.

Eventually years later after peace time, Masako travels to Universe 1, meeting with Kenkai. The two talk and eventually agree to travel to Universe 2, however Future Kin comes as well.

In Universe 2, Kenkai gets into a small argument with Masako that eventually evolves into a fight, where Masako uses the X-Kamehameha technique to kill Kenkai for the first time. After being revived, Kenkai doesn't resent Masako, just realizing he did something stupid - where in reality he's just scared of Masako's power and refuses to attempt to fight him in any way, verbally or physically.

When Kenkai is shown Universe 2's Takama and Makeo, he begins to regard Takama as an ally. However, Kenkai begins to grow jealous of his power and attempts to kill Takama. However, Makeo also joins the battle, which leaves a majority of his android body destroyed. Makeo is made a saiyan by usage of the Universe 2's Earth dragon balls, so Takama and he fuse into Takeo, defeating Kenkai and killing him again.

However, this time he resents the two a lot, however feeling more respect for Makeo, therefore, leaving most anger towards Takama. Because of this, he spent msot of his existence plotting revenge. During the Battle of X, he targeted Takama, however was defeated in battle. He wasn't revived for the Battle of X, so he was just transported back to Hell afterwards.