He was seconded by all but one of his tutors* to various Imperial organisations including the Adeptus Ministorum and the Inquisition.
Do you mean recommended rather then seconded, I think seconded means assigned to/conscripted. I wouldn't include the inqusition in that list as normally acolytes taken from scolas are chosen by visiting Inquisitors, and if that happened he probably wouldn't have a choice. Also, what does the asterisk lead to?
took him on as his apprentice.
The convensional term is acolyte, or more specifically interrogator, though there are other roles an acolyte can have. Look at the judicious remit article (follow Marco Skoll's sig) to see some of them.
His inferno pistol was a gift from the Mistress of the Order of the Blooded Thorn, based on Severin III. He sees the weapon as the physical representation of the Emperor’s divine judgment, and thus does not ever use the weapon except for the execution of heretics found guilty on trial.
Really? The inferno pistol is a legendary weapon but he only uses it against incapacitated prisoners? Although I don't think that the ammo would be so rare (as it is loaded with the same gasses and fuels as other melta weapons, it seems foolish not to use it in 'field executions' (combat) if it would be more appropriate that the shotgun e.g. Chaos space marines and other opponants with high T and/or high Av. Maybe you could say he doesn't use it against say, an Inquisitor or other opponant that he is having a violent dissagrement with, but who he doesn't think is a full blown heretic.
WS:67 BS:56 S:54 T:55 I:63 WP:78 SG:61 NV:72 LD:69
In my oppinion you've underdone the stats, assuming that he is only a recent Inquisitor so the background is 'up to date' so to speak. I'd expect a background in the Scola, training as an acolyte and a 'hardy constitution' would give him a Ws/Bs in excess of 65, esspecially as he was 'a brilliant student and excelled in all aspects of study...[and] performed admirably in both academic and physical pursuits.' So I'd suggest increacind Ws and Ws by about 10 points between them. Similarly, Scola training, acolyte training and his ability in physical exersise
would suggest to me S and T in the 60's, so I'd give them about 10 more each.
Mentally he is quite slow. Most Inquisitors have Speed 5, so initiative of at least 70. I recon Sg of about 75 and Wp, Nv and Ld of about 80 are fairly standard within the ranks of the Inquisition, so I'd increase them all by 10 too.
Weapons: Sword, knife, 3 throwing knives, pump action shotgun (6 solid slugs), 12 additional solid slugs, inferno pistol, 1 frag grenade
Why a sword? An inquisitor could get his hands on a power weapon if he wanted one, and if not a chain weapon would be just as easily obtained. I'd convert it to a chainsword personally, as they are under used in Inquisitor. He only has a basic shotgun and basic ammunition, why not have some fun with a dual magazine pump or semi automatic, and some more interesting ammo? As I said above I wouldn't have thought that inferno pistol reloads would be any rarer than other melta weapon reloads so I'd give him one or two, three shots is hardly worth it.
Armour: Carapace armour (chest, abdomen, groin), AV1 everywhere else except head
No issues here, but what model is it, can you link a picture? Is it the one here?
http://www.games-workshop.com/gws/catalog/productDetail.jsp?catId=cat1300164&prodId=prod1110092If so the carapace armour is only on the chest, though I'd upgrade the rest to 2 or 3 points of armour.
Skills: Heroic (I usually use very few skills, but commonly give Heroic to warband leaders)
Hmm, I wouldn't. I'd give him leader instead and only give heroic to characters who would never chose a course of action because it is safe, and regularly risks themselves to achieve their objectives. Maybe find another skill that would fit. Maybe you could represent his scola training with a shooting and a combat skill, like first strike and rock steady aim. In that case I'd say the Ws/Bs increase was unnecessary. Or else how about word of the emperor, seems appropriate for an ex-commissar.