>>77802303As someone who works in the SEO field, the genuine answer is kinda funny: His keyword relevance is just totally fucked. I don't know how Youtube seo search works in particular, but the mere mention of 'Ryoma Barrenwort' in the channel description and genmate links of Klara and Twisty are being recognised by Youtube as the most relevant terms related to the topic. Probably because there's a lack of content, discussion, or anything at all for youtube to index, PLUS the abysmal views putting it lower by default.
Interesting bit of trivia is also that 'Vtuber Ch.' follows that same principle. I don't know whether it's intentional, but it just does. For example, Pekora cannot compete with clip channels for the keyword 'Pekora' for a variety of reasons, so the target has to be 'Pekora Ch', where her channel is at the immediate top.