I'm doing an action which, if we were sitting around a table, I'd ask if would work on rats and would get an answer immediately. As such, I'm assuming that Fearful Aura works on rodents as as far as I remember, unless otherwise specified in their entry, everything is susceptible to Fear.
If not, let me know, and I'll edit her action.
Fearful Aura: (1D10+5)[7] vs TN 7. Success.