We’ve all had that classmate or a certain group of classmates that seemed off. There were also the group of individuals who liked manga or anime and the like. However, this does not make them weird. Many anime such as dragon ball z has great action and plot for young kids, especially compared to the average American cartoon.
Regardless, there will always be that kid that seemed somewhat off. These special kids may or may not be mentally slower. If you antagonize them, they may take it for a bit and then one day snap and go crazy in a disturbing way. Smart bullies would avoid bullying these individuals.