They often share same interest in love, but none of them dares to take a step, so they both are always single. Still Riika is more successful, she at least tries to talk, usually end up with person, who speaks a language she does not (Icelandic) xD
also they are pretty competitive people, especially with each other.
Edit: I dunno who they talk about here xD I made it as a general pic, but then I saw the new Ari (I love him >3<").... heh xD