The plume for the knights is a great start, I just hope future plumes will look more like this one (and hopefully don't have anything else like a jewel covering it...) :
knight helmet with feathers isolate on white background Stock Vector Image & Art - Alamy
Wallpaper metal, armor, feathers, helmet, knight images for desktop, section мужчины - download
Russia, Sochi 14.03.2020. a Medieval Knight`s Metal Helmet with Patterned Chasing and a Long Ostrich Red Feather Stock Image - Image of protection, feather: 189227675
Knight Helmet With Feathers - 1280x853 Wallpaper - teahub.io
Amazon.com: PORTHO Gondor's Knight Helmet, Horror Gondor Fountain SCA Knights Armors Helmet, Fantasy Armor Unique Feathers LOTR Helmet Best Gift : Clothing, Shoes & Jewelry
Knight's Helmet with blue Feathers. Realistic... - Stock Illustration [66770253] - PIXTA
Shiny Brass Helmet Feather Hollywood Look Medieval Armor Knight Helmet : Amazon.in: Car & Motorbike
Knight in Shining Steel Armor and a Helmet with Feathers on the Horse Isolated Stock Image - Image of isolated, shining: 139542603
single word requests - What is the "ponytail" in a knight's helmet called? - English Language & Usage Stack Exchange
Knight Helmet with Plume Beach Towel for Sale by Douglas Sacha
Antique Pewter Medieval Knight Helmet Great Helm Crusader Costume Red Plume - Walmart.com