初瀨伊綱 (初瀬 いずな, Hatsuse Izuna)是一名曾經作為代表與人類種進行過競賽的獸人種女孩，在空和白統合艾爾奇亞聯邦後，巫女指派她跟隨空白並向他們學習。 空和白十分喜歡像撫摸寵物一樣撫摸她(尤其是尾巴)，這導致她的祖父十分嫉妒。史蒂芬妮發現其實伊綱與空白有很多相似之處，例如不通世俗、傲慢無禮、耍小聰明以及擅長遊戲。
外貌
與其他種類相似，伊綱具有動物和人類組合的特徵——她有狐狸般的耳朵和蓬鬆的尾巴、深紫色的頭髮和栗色的眼睛（輕小說中為黑色頭髮和黑色眼睛）。她的瞳孔垂直開衩，類似於貓。
當伊綱使用「血壞」能力時，她的尾巴會膨脹變大，而她身上的所有皮毛都會變紅，額頭上會出現紅色的印記。
人格
[[空])和白非常喜歡她，他們喜歡撫摸她的皮毛，而伊綱似乎對他們有同樣的喜愛，喜歡被寵愛。她曾經提到，自己的祖父初瀨伊野的撫摸技巧還不如「禿猴子」（空和白）。後來，空白伊綱組成了三人組，發展出類似兄弟姐妹的情結。
由於她仍然在學習人類種語，因此有在每一句話句末都說「です」（desu，的說）的口癖，她本人認為這樣聽起來更有禮貌，其實這在日語裏某些語境中是不對的。
She mostly exhibits an innocent personality pertaining to her age yet is very competent at playing games to the point of representing the Werebeasts in national games against other races. In the English translated light novels and anime, she has a habit of unknowingly cursing without actually knowing what the words mean.
Before meeting Shiro and Sora, she never had fun in games, as she was trained to win, not to seek enjoyment.
能力
She possesses all the incredible physical abilities found in all werebeasts as well as the rare "kekkai" ability (aka 'Blood Destruction') found in a select few werebeast individuals (although she is only able to remain in that form for only a few seconds before she risks death).
She has the ability to learn at an amazing rate if what she is learning is game-related as in the case of learning to read the Imanity language from a game book overnight while Stephanie slept (still limited in speaking the language however).
弱點
Despite being considered "mature" among the Werebeasts at the age of eight, she is still naive in adult-related subjects.
瑣事
- It was revealed that among Izuna's numerous sibings and relatives (Offsprings of her grandfather and 30 "grandmothers".), Izuna was the only one who inherited Kekkai from Ino.
- She lived with her parents in a residential area, with her grandfather visiting her daily.
圖片冊
en:Hatsuse Izuna es:Izuna Hatsuse fr:Hatsuse Izuna pl:Izuna Hatsuse ru:Изуна Хатсусе