The only members of Onyx he really interacts with besides Sasuke are Sion and Dino, and he likes them both pretty well. Sion seems well meaning and helpful (though determined to exhaust himself), and Dino is...idk, but Itachi actually finds him kind of amusing. He enjoyed teasing him about the fireworks, for example. He also likes Aeris, though he just recently found out she switched, so he's not used to thinking of her as Onyx yet.

Other than that he has impressions of Hermana, which is positve. And Yuri, which was mostly neutral until he found out from Sion that he was close with Vincent. So now he's pretty sure he doesn't trust him. The rest of Onyx he hasn't met.

Dino's impressions of Emerald?