Anemone?

An insane SeaWing princess (dragonet) animus who enchanted some fabric to be waterproof and indestructible as well as turning dragons into plushies when she sews it into their scales. She was once kind and outspoken, but now she's secluded and obsessed with plushifying others. She goes to Jade Mountain Academy, but she barely shows up to class. Family: Coral (mother), Turtle (brother), Tsunami (sister), other brothers. Friends: Tamarin (blind RainWing dragonet). All queens in Pyrrhia: Coral (SeaWing queen, her mother), Ruby (SkyWing queen), Thorn (SandWing queen), Snowfall (IceWing queen), Moorhen (MudWing queen). Plushified victims: Moonwatcher (NightWing seer and mind-reader dragonet, she knew too much), Turtle (SeaWing dragonet, her brother, only one who could stop her), other various dragons (no queens, though). Jade Mountain Academy staff: Tsunami (SeaWing, her sister, principal and teacher), Sunny (SandWing/NightWing hybrid, Anemone thinks she'd make a great plushie but hasn't gotten the chance, assistant principal), Clay (MudWing, teacher), Starflight (blind NightWing, librarian), Webs (timid SeaWing, teacher).