Kagami Hayato is a Japanese VTuber with Nijisanji, known for his expressive voice and gaming streams, and this short clip circulates among fans as a reaction sound. Its title pairs his yes with Solaire, the cheerful Dark Souls knight famous for the praise-the-sun gesture, a reference many gamers recognise instantly. That crossover appeal helps explain why a clip lasting barely a second keeps appearing in edits, streams and memes: it works as a quick, positive affirmation that needs no context beyond the shared joke.