Milk sugar constellation

What blood type is Niu Naitang? Niu Naitang's blood type is B, and Niu Naitang is the protagonist in the comic book No.23 Niu Naitang. At the beginning of the animation, it is mentioned that Niu Naitang is a naughty and lovely ordinary junior three girl, and her grades are not top-notch or left behind, and she is at a medium level. Student number 23, 23 students who often take exams, and their blood type is B.