An advanced variant of the Harpy Scout.
The Harpies are heavily connected and related to the Sisters of the Empire, they are long-distant allies since the Imperial Regime. Though naturally tamed, these Harpies may bolster the Sisterhood's ranks even so.
Harpy Seekers hurl pin feathers and they can also learn Serrated Feathers to deal a little critical damage.
Update on 02/06/23: Simplified version.