Okay, PiP, how's this for your mentor:
Called sometimes the master of the Theran borders, Caelestis fights to defend a Thera he very rarely sees much of, for his gifts make him much needed on Thera's contested zones with the Heraclidae. Not any kind of Oracle, the man instead has some of the keenest and far ranging senses in the entire compact, seeming to be able to view divine energies themselves, that he can see divine gifts even as they are shaped, that he can look across planes of being, to see, some say, into the very souls of men. It is said that his capacity to see and hear coming threat drove him to condition himself to be able to face it, to do something about the suffering and agony that came first into just the corner of his gaze, then painfully into view. It has made him a figure of conviction, and also more than a touch dour, perhaps a reaction to the darkness in the world he looks to from beyond, from on high. There are suggestions sometimes for the man to take sabbaticals from his command postings over various legions, but he himself ignores them.
Appropriate to his heavens lofty senses, Caelestis more floats just off the ground than walks upon it, his hair and eyes flow with starscapes of black and silver pinpoints of light, his build a lean and hard one, forged from countless skirmishes and offensives.