sui (isekai ojisan)
ツンデレエルフ(異世界おじさん) ツンデレエルフ スザイルギラーゼガルネルブゼギルレアグランゼルガ=エルガ 翠(異世界おじさん)
Sui, from the manga and anime series Isekai Ojisan. Her real name is Suzailgiererzegalnelvzegilreagranzelga Elga, but due to it being completely unpronounceable she's called either Sui or "Tsundere Elf".
She is a tsundere elf who has long blonde hair, green eyes, and medium breasts. She is in love with Shibazaki Yousuke. Shibazaki sometimes genderswaps as her.
She is voiced by Tomatsu Haruka.