I can't but feel like the Wendy/Irene/Seulgi triangle reminds me of TaeNySic. In my head...

WenRene = TaeNy

SeulRene = TaengSic

WenGi = JeTi

Like, WenRene seems like the most popular RV ship(that I've seen), and TaeNy... well, you know about TaeNy. Plus, it's like the leader(Irene/Taeyeon) and the english speaker(Wendy/Tiffany). With SeulRene, they're like the secret yet still known pairing, like TaengSic. Both pairings include the oldest and second oldest, in their respective groups. And WenGi feels like the "best friend" relationship, mostly because of their close ages(even though JeTi's reason is because they both came from America).

Perhaps it's just me, but who knows. I'm not asking you to agree with me. I'm just expressing my observation and opinion.