The main characters are probably pretty weak in terms of personality. Nothing really interesting about them yet, quite surprisingly the new characters introduced in the Rumble Town arc are able to carry the show better than Seth and Mélie.
Probably the reason this anime will get a low score, dropped by many viewers and not garner any attention due to the self cucked boring intros, fillers from the starting 10 eps.
Overall it's a not bad shounen anime if you can survive past the boring intros and fillers.
