Number of videos (that are still up) with at least one million views by Holo:
Marine 11 (3 songs, 5 short videos, 1 longer video, 2 streams)
Aqua 10 (8 songs, 2 streams)
Suisei 10 (All songs)
Okayu 9 (7 songs, 2 streams)
Shion 8 (7 songs, 1 stream)
Korone 8 (3 songs, 2 short videos, 3 streams)
Matsuri 7 (All songs)
Pekora 7 (3 songs, 4 streams)
Watame 7 (All songs)
Kanata 7 (5 songs, 2 streams)
Fubuki 6 (4 songs, 1 short video, 1 stream)
Towa 6 (All songs)
Sora 5 (All songs)
Haato 5 (4 songs, 1 short video)
Miko 4 (2 songs, 2 streams)
Noel 3 (All streams)
Rushia 3 (1 song, 1 stream, 1 short video)
Polka 3 (All songs)
Roboco 2 (All songs)
Azki 2 (All songs)
Subaru 2 (All songs)
Coco 2 (1 short video, 1 song)
Ayame 1 (KING)
Mio 1 (SPARKLE)
Botan 1 (3D debut)
Lamy 1 (ARE YOU LEADY?)
Mel 0
Aki 0
Choco 0
Flare 0
Luna 0
Nene 0