It is not known what the Nameless Namekian's personality was like originally, but after purging himself of his evil counterpart, he becomes a normal peaceful Namekian known as Kami. Though he could count as a Warrior-type Namekian, he gives up martial arts almost completely after becoming Guardian of Earth (though he later fights Piccolo Jr. as Hero and Garlic Jr. as himself). According to Korin, Kami does not like visitors and will send any rocket ship trying to reach him back (implying it has happened at least once). His need for seclusion may stem from growing up by himself in the remote Yunzabit Heights. Despite having a legitimate care for the Earth, he began to think all humans were selfish and distrustful as he watched humanity grow and rebuild after the King Piccolo wars, until he meets Goku, which renews his faith in humanity (despite Kami somehow knowing that Goku is not from Earth, though it may have been Goku's love for his friends that changed Kami's mind, of course he may have also been inspired by the actions of other Earthlings such as Mutaito, Roshi, and Goku's friends). Kami's respect for Goku was great enough for Kami to see him as a potential successor and even offered him the position of Guardian of Earth after the 23rd World Tournament, even suggesting that Goku and his soon-to-be wife Chi-Chi could live together on the Lookout, though Goku ultimately refused, to Kami's utter shock. Though he normally refrains from combat after the Piccolo Jr. 

Kami also has some complexity to his character, as even though he was the Guardian of Earth he felt as if he was not deserving of the title. This is because King Piccolo and Piccolo's existence relied on him being alive, leading him to want to take his own life on several occasions. He reiterates this to Goku at the end of the 23rd World Tournament. After Master Roshi explains to him how none of this would have been possible without him and the Dragon Balls, Kami is able to forgive himself and continue as Guardian of the Earth until he fuses with Piccolo. Kami still remained a part of Piccolo, as was noted by Piccolo when he gave him strategic ideas in combat (most notably against Imperfect Cell in order to get information). He also encourages Piccolo to continue on fighting during the Tournament of Power, knowing full well that the fate of Earth and Universe 7 is at stake.