When we lost Phineas, Bezukhov made it clear he considered the Silver Villa Phinny’s domain. Though Bezukhov & Phineas originally moved into the Villa at the same time, its location was/is the same as the Ferplast, which was definitely Phinny’s home. If you recall, when Phineas arrived, Cagney & Bezukhov did not want him to sleep overnight with them so Phineas had a cage all to himself, at least at bedtime. So it seems that by location, Bezukhov regarded the Villa as Phinny’s.
Bezukhov found it difficult to go in the Villa without Phinny’s presence. He quickly decided that bedtime would switch back to the Manor. Dalai followed him there.
During the day, he avoided the inside of the Villa. On top & around the outside of it was fine, but he was not comfortable going inside. It took a couple of weeks for him to venture inside to drink the water or chew the iodine block but he generally just took what he needed & then got out – he did not linger. Gradually, as Dalai spent time in the Villa, Bezukhov’s visits got longer & over the following weeks Bezukhov began to sit in the Villa & even eat in there. He now appears quite relaxed in there, but bedtime is still in the Manor.
Note: Check out the difference in feet colour between Bezukhov & Dalai.