 If you liked
Iris Zero
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 ...then you might like
Yuukyuu no Gusha Asley no, Kenja no Susume: to, Pochi no Daibouken
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A lonely protagonist, detached from society because they were once considered inapt in the academy. Even tought iris zero is not an RPG, we can see as how the protagonist is really inteligent in solving problems in which, they didn't look out for, but were forced to take.
The protagonis is also really caring with it's friend.