first meeting/iago's first thoughts on kenichi?
Iago's whole life and, inevitably, their initial reaction to Kenichi is tainted by suspicion and fear. They would be particularly wary when finding out he has a goal of fighting against the cult of Bhaal- while Iago holds absolutely no loyalty to their father and they themselves carry the same disdain, their prey animal instincts nature would lead them to believe the twins were one slip-up from becoming his next target. They would be cautious and secretive, to put it lightly (a little more so with Kenichi, but, honestly, that's just their natural state).
There's quite a bit of admiration-confused-with-jealousy Iago feels towards Kenichi. He is a lot of things they are not. He is a cleric; when Iago was younger, they wanted to be the same (following in their mother's footsteps) but Bhaal stopped them before they could get far on that path (it's the reason they can't do any healing spells despite their magical prowess otherwise) (I wonder if Bhaal might've learned his lesson after losing Kenichi to Lathander and refused to let it happen again?) . He seems cool and collected; Iago's similarly stoic demeanor comes from practiced apathy, not discipline or tenderness. He has dedicated his life to fighting Bhaal in a thousand ways; Iago has only ever submitted or run away, too afraid to do anything else of note.
Also, he's familiar. Before Iago knows about his lineage, they get this itch in the back of their mind that drives them crazy. They feel like they should know him and not being able to place it at first would almost entirely override their previously mentioned emotions with curiosity, prompting them to study him like a hawk and likely try snooping in his tent or otherwise gather information. Still cautious, still scared, but dying to know what it is about him that makes them so familiarly nervous. They aren't a stranger to murder attempts from their family (Puck- against his will and under Bhaal's influence, and Orin- nearly every day, fully lucid, they just did not get along), so there would be some underlying, mysterious fear that they wouldn't be able to pin down. At least not until they realize it's due to meeting another child of Bhaal. Which would, unfortunately, amplify this feeling rather than bring them a satisfactory answer when they first find out (they have an awful habit of driving themselves mad with questions they know they won't like the answers to. Curiosity killed the Iago).
