"I'm Tris! I have psychic powers! I cast from Cunning but I'm more like a sorcerer, I don't prep in the mornings I just do whatever. Mostly stuff related to the mind but I can also make my crossbow shoot through walls and around corners. And I'm interested in" general gesture in the direction of the lighthouse "occult happenings".

"I'm Samora! I just graduated from seminary up in Lastwall and came down here because I heard there was adventuring to be done. I heal, I spellcast, I am and I quote 'not a complete embarrassment' with a sword."

Oh no. They're so small? Why has he been assigned these small and earnest children? They shouldn't be-- okay, no, there's no way, they're obviously going with or without him even if he tells them they shouldn't. 

Welp. Guess these are his small and earnest children now. 

"........A pleasure to meet you, miss Tris, miss Samora," says the suit of armor. "I know very little of magic, myself, but with any luck shan't need to, as I am for swords." Pause. "Well. I am not entirely sure I remember how to swing a sword, actually, but I suppose I will soon find out." He shrugs, and considers, and attempts, optimistically, "I am called--" 

"--Marshall." Huh. 

Well, that's probably auspicious on the remembering how to use a sword front. 

He had a family name, once, he thinks. Maybe that one will come back eventually too. 

"Why don't you remember if you can swing a sword? Did something happen to your memories? Can you tell me about it?"

Ah, so it's the casting from cunning that makes you A Wizard and not the spell prep. Honestly pretty reasonable questions. "Would you like to spar with me before we go look at the lighthouse, see if it refreshes your memory a bit?"

"I suppose something must have happened to my memories, yes, but naturally I cannot remember what it was." Shrug. "It will return in time, or perhaps it will not. I would be happy to spar a bit, though we should not take too long at it and find ourselves forgetting to pursue our true objective." 

Marshall, it transpires, does not super remember how to use his sword. He moves like he's expecting his limbs to behave very differently than they do and every time he reaches for a specific trained move, the way Samora can do because she has been drilling on them daily for years, it's not there. He spends most of their sparring time grumbling to himself about how he is absolutely not in any way up to standard and this is embarrassing and he's very sorry. 

It will by about five minutes into this be obvious that his standards for himself are, actually, insane. If they were trying to have a real fight to the death in an antimagic field, he'd win. 

Well, memory problems or no memory problems he's clearly good enough to be an asset to the party. "I hope you get your memory back soon, not being able to remember things sounds really rough." And they can thank the astrologer for the introductions and go check out that cursed lighthouse!