Hille

Hille is an Aurum-rank member of Rundh.

Chapter 1 - Ahr
After Fyr, Ylve, and the protagonist are thrown back into the mortal realm, Hille arrives and tells them that he was on his way to investigate the Gladewood Ruins. He also reveals Ylve's condition, and takes the three to the Rundh Headquarters.

Chapter 4 - Haunted
Once again, Hille arrives after the party has escaped the Rift. Geniva  tells the others that he is the one who gave her the quest of investigating the Blackreach Mansion, and Hille escorts the group back to Rundh Training Facility.

Other Roles
Hille seems to be the one who recommended Fyr and the protagonist to Lady Ruri. Rulmann has also hinted that he has always had a "bothersome" nature.