On my conquest to Compare Suzumiya Haruhi no Yuutsu with Clannad, I stumbled upon an interesting discovery on episode 7 (or 10 depending on the order). This is the conclusion of the remote island storyline where Haruhi wraps up the fake murder case. Of course, other PW fans spotted this parody and one even made a Youtube Video about it.
Upon watching this we can make certain connections:=
We can also make the assumption that Kyon's little sister is Pearl Fey and Mikuru is Maya Fey but I couldn't find pictures that did the comparison justice.