Diarmuid is just worried about his new friend. He doesn't realize that Pharos is more than he appears...

"The puppies really like you. Make sure to come and visit them a lot, okay? You can help us take them to the park and walk them if you would like!" He doesn't miss how much Pharos seems to like them and they him. There is no reason they shouldn't all have fun together.

He opens the door and motions toward the hallway, "Lets go get you settled into your new apartment! Then, if you want to explore more, you can!"