"Assassins are taught not to be scared by the element of surprise...Because that's what we're best at..." He spoke, continuing to walk towards the gates of Shibusen, towards their dorm of which they shared together due to their partnership, he smiled as he was almost there, he was all sweaty due to his training and couldn't wait to get in the bath and wash his troubles away.
The reason he was in the dorm and not in the Akuma House with his mother was because it was far too far away to walk there, so for practicality reasons he needed to stay in the dorm.
(Change topic babe, to the Student's Dorm. :3)