I know it's not much, but Elira said thank you to Selen for organising the NijiEN Prism Cup at the end of her stream of the event! She doesn't actually speak to Selen, but she still mentioned her, so it's something! Here's the link and timestamp of that moment!
https://m.youtube.com/watch?v=ySjBmGNYnKg&t=11266s 4:42:21
