Mans appears as an ordinary Raven, usually perched on Garridan’s shoulder, or in his vicinity. Mans seems intelligent and well trained.
Mans’ Laughter (Mans for short) was named by Garridan as he is a single Crow, so he’s not a Murder, aka a flock of Crows.
Mans presence is what earned Garridan his nickname in the church as “Dr. Crow”.
Mans is actually a fey spirit of intellect that Garridan has formed a bond with and can perform a ritual to give Mans a corporeal form. If Mans is slain Garridan is able to recall the spirit by performing the ritual again.