Well, as I mentioned, Medi does have feelings for Rockman and Rockman in turn speaks very highly of her. Also, unlike Roll, Medi is actually able to fight and doesn't act like complete fangirl when it comes to Rockman.
As for symbolism...there doesn't seem to be any that I can think of.
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It's called Shonen Jump, not Shonen-ai Jump. Stop with the yaoi, people!