Kanzashi is the general term for hairpins, I believe, but I don't know the specific names for the individual pieces.. if there is any.
Masamune Date - Sengoku Basara
Team Aqua Grunt (male) - Pokémon Ruby/Sapphire Version
Eren Yeager (casual outfit) - Attack on Titan
*~Next con I'm attending~*
??? ??? (?? 2015)