Board Thread:General Discussion/@comment-44056425-20200213100824/@comment-44993037-20200215115225

Michaela trait and blood type isnt the same its said that michaela trait is super rare, among boys but girls have that blood type too and bloodtype zero is rare but not as rare as individuals with the michaela trait unless we have any reason to assume ppl with bloodtype 0 were mostly wiped out pre apocalypse

Its pretty standart in japan to think of a bloodtype for a character, its popular afaik