>>4212536>>4212625>>4212653How they feel about each other doesn't matter. Most of the people who've been exposed to V-Tubers aren't in the rabbit hole, and have only seen a handful of clips. For the vast majority of them, that's either Kizuna Ai or Korone.
Kizuna Ai didn't really do collabs at her peak, so any iconic duo in V-Tubing would have to contain Korone. The only possible contender against Korone/Okayu is Korone/Mori, because everyone's seen "I'm die, thank you forever."