Loz is one of three beings created by Sephiroth as manifestations of "his will". He and his "brothers", driven by Sephiroth's will and their own personal obsession, sought out their "Mother": Jenova's head. Loz represents Sephiroth's violent streak, masculinity, and sensitivity.

He is upset very easily, and is teased by Yazoo, who even went to the length to ask Loz on the phone if he was crying (happened during fight against Tifa). He cries at the thought of never finding "Mother" and called Reno, at one point, "Meanie."

He is faster than his brothers (Yazoo and Kadaj) and uses brute strength to fight. He is the brawler of the three and uses a unique weapon called "dual hound" most of the time, although he does also use a gunblade as well.

He died after using an excessive amount of materia to perform a Kamikaze attack with Yazoo.