@Mr_1RaE CH25 is a drawing of a mug shot of him and he is ~1,68cm -> BMI = 47/1,68² = 16
He has underweight. Unhealthy not so much, he has no eating disorder.
People are different. Deviating from the norm doesn't mean he is unhealthy.
I will note BMI isn't necessarily a truly reliable metric, but I suppose it can give a vague guideline, so long as the individual has a normal enough build, I guess? But, still, everybody's 'healthy' is different.@Mr_1RaE This is kind of normal weight for Asian highschool kids comsidering their height. I was 45kg and 164cm in 11th grade as well