You're still physically weak as well. [ Why does he feel the need to amend that so quickly? As if it's somehow embarrassing to say something positive about a comrade in front of Itachi. Maybe because... well, it strikes him that he hasn't really, before. He'd been protective over Naruto, but those feelings had been overwhelmed by his anger at seeing his brother. And fellow students at the Academy? He'd wanted to impress Itachi by talking about how much better he was doing. That simple "he's reliable" might be a mildly revolutionary statement from him. ]

We aren't splitting up. [ His expression turns almost sharp when he disagrees with his brother, softening a moment later when he catches himself. ] ... I won't limit you, Stiles, if you have a need to investigate anything independently. Normally I would help. But Itachi and I will stay together.

I've told him about monster and witch designations and the Cwyld, but nothing detailed about either.