A watched pot always boils

It was impossible to know what Sleph was thinking. He wore a hooded cloak at all times, and even when his face was visible, it was just a mass of purple tentacles below two slit-eyes that burned with a pale yellow glow.
This didn't mean that he was unknowable, however. He'd taken the Stag Lord's old room at the fort, replacing the dozens of empty wine bottles with a decorative range of tea and teapots. He'd invite Chisha or one of the other nobles there to chat and go over strategy. A suspicious individual might think it was a ploy to show that he had nothing to hide and to make sure no one thought he was up to something unscrupulous. 
His person impression wasn't perfect. He never ate, and didn't seem to sleep. He'd occasionally be seen talking quietly with a few oddballs - a dwarf with only one eye, a halfling wearing extravagant but very dirty robes, and Oak the trader-slash-ambulatory-tree-person. Sleph said they were his friends, and seemed to mean it too.
The townsfolk didn't seem to mind him, although you're pretty sure that no one knows what a mind-flayer is. The few who do realise that he's something unusual suspect he's a "deep one", a name for the octopus-like people that live in the depths of the sea. They're wrong, but deep-ones are known to be friendly and courteous, and you see no reason to correct them.
Recently he's taken up with Walter, your new cartographer friend. Sleph has never had a chance to explore the plains, for fear of ending up as wolf chow. You get the feeling that he's searching for something, but doesn't know where to look. 
It's impossible to know if his true motives are something nefarious, but can you really be suspicious of someone so hellbent on ensuring the safety and prosperity of Lycia? If anything, it would seem that he's a little too loyal to the new nation. But you're almost certain that this is a good thing. Almost.