no, she's not
She is, if it was 54-58kg , that'd make sense given her height and body but I guess author didn't think much of it. Like I'm 158 cm and my weight is 54kg , I'm not skinny nor fat.
im 150cm and 46kg and my doctors say its an ideal weight, she is definitely underweight
bc of that bmi thing? maybe. but seems healthy to me
Nah not bmi , just in general, bmi is pretty inaccurate, general health checkup and waist to hip ratio are more accurate, but aside all this , rosa looks healthy and gorgeous anyways ,the characters are fictional so my bad for getting pressed with weight ( ꈍᴗꈍ)
48kg? my girl is underweight