Illiendi ignored Amano's pained look, out of no personal malice of course but from Amano's own orders. It was perhaps in this way that demon's of his caliber were superior, emotional attachments were not something they were susceptible too. Lesser demons who missed their humanity and the emotions attached to them were quick to fall in lust or into rage, where those like Illiendi were far beyond such. Once they had been angels and all they knew had been love but that had been ripped from them along with their wings when they fell with Lucifer. Illiendi was therefore left in his contemplative slump, ignored aside from a small mental note to remind Amano he was merely carrying out the orders he was assigned, to be the household servant while they stayed here. Besides, he gathered Kenneth's ego was easily abused, to address another as Master in his presence was unlikely to gain the favour of the elder which, apparently, seemed rather important. 

As such upon entrance to the office he gave Amano a polite nod and little more until it came to serving the man tea and watching as he idly brushed the brand of his. Such an obvious child he was, how he'd love to simply...but he had a job to do and that twinkle in devious eyes disappeared like a shadow over the moon. He of course served Kenneth first and every finger tap had the glass neatly refilled without so much as whisper from the demonic butler. He listened despite his appearance not to, busying himself with light dusting about the room with a handkerchief, returning to top Kenneth up when necessary. The little Lord was doing rather well, the insecurity he had was hardly shown, surely his father was having trouble noticing. Amano was choosing his words rather well, his father seemingly had little to complain about though as eyes fell on him more than once the demon had the feeling Kenneth was becoming more interested in him than the little 'adventure' his son was planning.