I just finished watching the Christmas special (again), and this time I've noticed in a scene at Alya's home, the man that seems to be Alya's Father is the zookeeper from 'Animan'.
Upon further research, I have discovered that he is, infact Alya's Father, and his name is Otis Césaire.
(I know this isn't really important, but I wanted to share my discovery, or my Eureka! event.)
Sorry, I couldn't attach an image, but in the Christmas special- on Youtube- if you stop at17:20 you'll see Otis Césaire on the left, Chat Noir in the middle, and Alya on the right.