Yuuri can't be angry with Pentaro-kun for voting against her... cute
edit: Ok thinking about that got me thinking about which judges voted for which contestants and who has the best track record for picking the winner. So I went back and here's the voting records for each judge. Winners in bold.
Max Takeyama - Ritsu, Urara, Koyuki, Tsumugi [3-1]
Kageya Tooru - Hitoe, Urara, Michiru, Yuuri [2-2]
Nekota Nyaako - Hitoe, Urara, Koyuki, Tsumugi [2-2]
Otoboshi Aria - Ritsu, Urara, Michiru, Yuuri [3-1]
Otoboshi Tsubasa - Hitoe, Urara, Michiru, Tsumugi [3-1]
Pentaro-kun (staff) - Ritsu, Urara, Michiru, Tsumugi [4-0]
Pentaro-kun's picks have won every time; since their vote is worth 2 points, that's not too surprising. If Pentaro-kun had voted differently, it would have swayed the outcome of any battle except for the Second Guard (Shiori VS Urara). Three of the judges have only missed once: Tsubasa voted for Hitoe instead of Ritsu, Max voted for Koyuki instead of Michiru, and Aria voted for Yuuri instead of Tsumugi. The other two judges have even records, missing twice (Kageya voted for Hitoe & Yuuri, Nekota voted for Hitoe and Koyuki).
One point of trivia: Nekota is the only one who has voted for the Black Stars every time. No one's voted for the White Stars every time, since Black Star Urara defeated White Star Shiori unanimously.
Also, remember that originally the judges panel wasn't going to have Tsubasa, and Pentaro-kun's vote would've been worth 1 point just like the other judges. If Tsubasa hadn't inserted himself in, would any of the battles have had a different outcome? ... No, not so far, at least. Remove Tsubasa's votes and count Pentaro-kun's as 1 point and you still get Ritsu over Hitoe (3-2), Urara over Shiori (5-0), Michiru over Koyuki (3-2), and Tsumugi over Yuuri (3-2).
What does any of this mean? Probably nothing lol, but maybe the final battle between Ibuki and Mimi will end up coming down to Tsubasa's vote, since that plot point hasn't affected anything yet. And if so, I bet he'd vote for Ibuki since she's already a successful idol over the older Mimi who quit once.