From the artist:

Worse comes to worse you can get Agnes Surgeon to help patch you guys up.

Though admittedly the same event that implies the existence of Agnes Flight also implies that Surgeon is a male human instead (with likely a human name). Along with Agnes Takao.

(Curren's IRL late brother Spring Song was likewise human in the umaverse. Seems like IRL male siblings that aren't very successful and have no chance of getting umafied can sometimes show up as humans instead.)