Miteus

The party first met Miteus in the prison created by the Athena Group (Sx08). He was also being held prisoner by the Athena Group for investigating them. He was released as well as part of the deal Leoven made with Quintus. He helped the party escape retrieving their gear and sneaking out from the palace. He showed no real favour for the Athena Group and seemed to be investigating them for his own reasons. He says that he will probably head to Artemis Sentry to investigate further. He then separated from the party as they both headed to Artemis Sentry.
After making it to Artemis Sentry the party eventually run into Miteus again in the underground fighting arena, where he made a bet on the party and won, getting the information he needed. He then propositioned the party with helping him investigate this hidden experiment lab, in the sewers. This investigation was semi-successful for Miteus, as he got some information on one of the subjects that seems to have escaped The Owl and Spear this interests greatly but there is no news on where this subjects whereabouts. (Sx11) Notable behaviour was coming back for the party despite having the opportunity to escape. 
The next time he made it appearance he was seen chatting with Odysseus after the attack on Artemis Cove, he seems to have been helping out during the battle, and both seemed successful at least in defending Heroes Rest. (Sx26). Other appearances during this downtime period Oto confided in Miteus about his loss of control and personal conflicts, Miteus was a comforting presence at this time, but advised Oto to tell his freinds.
His most recent appearance was at the Battle of Nerolamia Highway, where he helped the party by distracting the Archer Black Mask. He unfortunately did not have the skills to take down the archer, and was promptly taken down with the archers twin short swords. Unfortunately the party never made it to check on the rogue as they had to deal with the transformation of Adrasteia into a Loup Garou. So as characters they had no clue but outside of game they knew Miteus had succeeded all of his Death Saves and was stable. (Sx34)