Ga'al-Jeh is the child of TzHaar-Mej-Jeh, but was born without the TzHaar knowledge, which healthy babies have.
His egg became too cool for hatching, and the TzHaar-Mej wrote him off as dead. Mej-Jeh recruits an adventurer to help him hatch the egg anyway, to prove the other Mej wrong. The egg hatches, but is a Ga'al.
Ga'al-Jeh is sent to the Fight Pit like other Ga'al. Players have to protect him, as Mej-Jeh wants to use Ga'al-Jeh as the subject of an experiment into giving the Ga'al memories.
Ga'al-Jeh has 2000 life points in the Fight Pits, but he doesn't try to defend himself in any way. Even though he survives the fight, with the player's help, he is immediately killed by TzHaar-Ket-Yit'tal, on the orders of TzHaar-Mej-Ak.
In the fight pits Ga'al-Jeh is accompanied by Ga'al-Xox, who manages to survive and plays an important role in the rest of The Elder Kiln quest.