He is an adult human lions, his intelligence was not altered even upon becoming a lion head, and he in fact has a very easy to understand personality, so anyone who knew him in life can notice that "oh, this is Edison" even after seeing him like this.
There is no point to note when handling him as a Servant, but because he unconsciously imposes his standards from when alive - that of sleeping 3~4 hours per day, the remaining time must be completely dedicated to manual labor.