The jaegers in Pacific Rim arent the only Kaiju Hunter, and of course there is an alien named Redman

Redman's history and back story were not stated in his series itself, but magazines stated that Redman was an alien that came to Earth after invaders destroyed his home planet and merged with Officer Sakomizu of the SIA.

In comparison to Ultraman, Redman's fights are typically far more aggressive and powerful, and Redman relies mostly on brute force and vicious slashes with his weapons, as opposed to the elegantly choreographed punches and kicks that are associated with the Ultramen

Redman specializes in hand-to-hand combat. Usually weakening his opponent with punches and kicks and finishing them off with his weapons. He did not use many beam attacks in the series because of budget. He also has some techniques which are used less frequently, such as stabbing a monster with a Red Arrow or Red Knife while riding on it, decapitating a monster with a Red Knife and bashing a monster's head repeatedly on the ground before breaking its cervical spine by turning its head backwards.

Redman earned the nickname Red Phantom Killer (赤い通り魔 Akai Tōrima) from fans because of excessive aggression he displayed in fights.

Matt Frank also made a comic book for Redman. The title is Redman: The Kaiju Hunter.

Redman's Weapons:

Up: Red Knife
Down: Red Arrow

Techniques:
-Red Thunder

-Red Kick/Punch
-Red Shot: a beam fire from the tip of Red Knife

-Red Fall: lift up and throw his opponents

-Red Chop
-Red Jump
-Slice Cutter
-Flight
-Teleportation
-Separation

Source: FANDOM Wikipedia