(I'm just gonna say that Isamu doesn't get around much. He usually lives off the land and spends little time in towns or inns while on missions, which will excuse my own lack of knowledge on things you bring up)
*He floated to Haruka, landing on their head and leaning down in front of them.*
Daiki: "This one... is a spirit. What kind? Where from? Many questions."
*Isamu, noticing Haruka's apparent discomfort, approached and picked up Daiki.*
"They shall be answered in due time. I apologize, Haruka. Daiki is a curious creature. He likes to ask questions about things he doesn't understand or finds interesting. Speaking of, he only lands on the heads of people he really likes. Congratulations, my friend. You have captured the focus of the most scatterbrained Kasugai Crow in the Corps."
*Daiki grumbled.*
Daiki: "I am not scatterbrained. I am merely... multitasking. Yes... multitasking..."
*Isamu laughed.*
"Whatever you say."
*Daiki retreated, returning to Tomiko and landing on her head.*
(For reference, to finish the description of his voice: It is calm and light, with a sort of floating cadence. It is lower in pitch, though closer to a baritone if he were a human. You know how Tanjiro's Kasugai had a high-pitched, very shrill voice? Imagine Daiki's voice as the opposite)