i think i can recruit a galdr but where? there is a quest that you need to rescue a galdr when the fight starts the galdr is on my side. when the fight is over the galdr is not on my side anymore

The galdr cl*** can not be recruited.
And to my knowledge no one has hacked the game or found some crazy gitch that will let you
recruit the npc cl***es such as

Greater and dark beasts including avatars of the affinity gods
Dark legonaire
Corrupted ludo
That one dark centourian.
Galdyr
The dark god
That one big guy with the weird mask that ludo hates
The affinity gods(valens story)
The cyclops king(ursala story)
Sorry but all these cool cl***es can't be played.