This episode is very interesting and visually stunning. We have Cobalt injured, and finally our mysterious white-haired friend makes an appearance to help and reveal to us once and for all who he is. The conflict of this episode is helping Cobalt recover his damaged memory, and to do so, his siblings must enter it and link their memories, one by one, as they manifest as giant spheres. For a moment, I thought they would give us more lore in that context, but it was instead an unnecessary recap of past moments with the songs we've heard throughout the season (Seriously, for a 12-episode season, a recap episode is completely unnecessary). However, aside from that, the plot continues to move forward, and although there are moments that aren't very surprising because they were foreshadowed in previous episodes, there are still things left to discover.