For one thing, the daemon seems Tzeentchian (blue aura shows that, doesn't it?)
Second, I believe Kirchoff might be full of shit. He was the first to read the script, and all he claimed was 'lololo rogue ecclesiarchy'? But now, suddenly, his dudeguy starts translating the thing and runs off possessed?
Third, all those anti-psychic auras could mean Shepard is some sort of a blank, just like Ezekiel, who also happened to be influenced by the Tyrant Star. Aaaaaaand it might also explain the inquisitor's interest in Shepard, since psykers get naturally freaked out by blanks. It doesn't explain the voices at all though.
Fourth, I have no bloody idea what to do. 1 seems bad because Kirchoff is sleazy as all fuck, 2 is bad because lol let's go around in circles, 3 could be bad because Groshaw will just freak out again with 'OMG I THOUGHT YOU WERE REDEEMER
((((((((((" and it's not like his darkholder instincts did fuck all earlier in the maze. 4 is the only one that doesn't appear completely horribad but I have no doubts it might just as well be the Outsider (or some other friendly star god) and will eventually lead to DEVOUR SOUL. As for 5...
We still have contact with the team securing the areas behind us, right. And I believe the Inquisitor is still on board the ship, right? Contact them and tell them to try to get the Inquisitor into this place ASAP and bring in many heavy boys with him. It will probably be too late when he arrives and the daemon will be freed, but he's probably the only one on the ship who can get rid of it once it's out of the box.