Suri

he fled to the overworld when his home dimension was overrun by parasites. he didnt realize in his panic and eagerness to flee he had brought them with him, and the cycle began again. though in his grief of dooming a world he swore to stay and fight the oncoming swarm, and that he would never run away again.

as someone who is incredibly familiar with these parasites and their weaknesses, he is a valuable asset, and may be the key to reclaiming the overworld...