straight-laced white knights (of the blood oath) unite!

hey EM...ILY i am mel! i'm playing asuna from sword art online! she actually gets blue hair later on in her canon and specializes in magic (spells) too so wow yeah. what is this blue hair/magic trope why

i'm looking forward to playing with you and seeing you around! idk kh that well but maybe aqua and asuna can be friends ;;