that's hard to say
i like them too : o
but you have a point there, their relationship is similar to ran/shinichi. i think it's because the mangaka was writing the kaito kid manga even before he started conan.
Yeah. I don't know who's better : Ran or Sera in fighting.
Heiji is cool. He and his kansai dialect!!
I just don't like very much Kaito Kid and Aoko. I think they're another rival. e_e
They're the same as Shinichi and Ran.