Michael and Hoichael

Michael and Hoichael are two kids who are renowned troublemakers in the backstreets of Water 7. They idolize Franky, and even dress like him and use his motto as their own: "Mm, super!!" They also idolize Paulie.

Water 7 Arc
They were originally suspected by Tilestone and Lulu to be the assassins who were after Iceburg. They are, in reality, just simply petty criminals involved in petty crimes such as Yagara Bull Gang activity, shoplifting at the supermarket, and other simple crimes.

Post-Enies Lobby Arc
The two attempt to mug Zoro as he attempts to return to the Galley-La house where Luffy and the rest of the crew (except Usopp) are staying to warn them about Garp's arrival. but Zoro beats them up and has them show him the way back.

In a filler episode, the two reappear as members of Auntie's "family;" while not related by blood, they consider each other siblings, and Auntie their mother. They appear before Zoro and force him to join their family over his objections. Zoro leaves after helping them defeat some loan collectors, saying that he considers his crew his family.