Ranmaru

Simpe guy from a big family. Helps his big sister raise her kids.
Meets a sketchy classmate later becoming best friends with him.

when he was little injured his left eye so it's pretty much blind.
Played baseball in HS, it helped him develop muscles but could not become a professional since he did not hate too much free time with chores and babysitting his cousins.

When he goes to collage his life become more financially stable but the habit of saving up and not spending too much is still there, so he becomes obsessed with deals and bargains.

There is a drastic difference between "at home" Ranmaru and the " outside" him when with the first option he does not give 2 cents at how he looks, so in his neighbourhood is freely walk around in the most lazy outfits, but when he goes to class or part-time job he cleans up nicely.

Close friends call him Ran ( pretty much only one persons) or Ran-chan (sister call him that)