In Tyranny of Dragons, through various means, the whole party got familiars. Iliira's was a fruit bat from the Feywild, named Echo.

Being a bat, Echo's Intelligence wasn't very high. She was, however, very cute.

>Echo: <Mistress, it is dark! I cannot see!>
>Iliira: "Just use your echolocation."
>Echo: <I am on your shoulder.>
>Iiliira: "N...no, echolocation, not Echo's location."