After seeing puzzling number of invalid votes in Japanese SaiMoe, I have to wonder if Suiseiseki's fan base might be very well connected to the tournament organizers. Below statements are based on the few angry people I communicated with, thus is not entirely reliable.
Suiseiseki won with much controversy in Korean Moe Tournament, as she survived a tie with Shana in round of 32 for both Shana and her got 420 votes, while another winner in round of 32, Housen Elis beat Asakura Nemu with by score of 299 to 263. The rule was, in case of tie, if there are winners with less number of votes compared to the votes in the tie, both participants in the tie will advance while the winner with least number of votes will not, in order to make room. Housen Elis is not what you consider strong character, but if you consider the names who lost in round of 64 and round of 32, you have to be puzzled why Suiseiseki drew one favorable match after another, yet struggled to win any of her match. Here are her results and notable losers in each round.
Round of 64 Suiseiseki 393, Asakura Ryoko 281
People were surprised by lack of voter turn out and the margin of defeat for Ryoko, who has received a huge boost in popularity from a poster pose in bunny suit.
Notable Losers
Takamachi Nanoha ( sweet 16 in Japanese Saimoe )
Shinku ( sweet 16 in Japanese Saimoe )
Chidori Kaname ( Finalist in 2006 AoMM March Madness tournament )
Round of 32: Suiseiseki 420 Shana 420
The infamous tie where if I could have voted, Suiseiseki would not have advanced.
Notable Losers
Housen Elis ( she won her match but with least number of the votes in the round )
Eruru ( Still alive in Japanese SaiMoe )
Asahina Mikuru ( Human Incarnation of Moe )
Fate Testarossa ( ( Still Alive in Japanese SaiMoe )
Round of 16: Suiseiseki 599 Matou Sakura 531
Observers said Suiseiseki pulled ahead during the final 3 hours of voting. hmmmm.
Notable Loser: Tsuruya San ( Her popularity was even greater than here in Korea, yet she had to draw the opponent that had score most number of votes against Suiseiseki: Tohosaka Rin )
Round of 8: Suiseiseki 707 Tohosaka Rin 656
Rin's vote was the 3rd highest of this round. Again, Suiseiseki pulled ahead during last 3 hours of voting. Fate/SN supporters got rather angry and denounced the legitimacy of the tournament after this result.
Notable Loser: Nagato Yuki ( Lost to Suzumiya Haruhi by 12 votes ) Many originally predicted this to be the final matchup
Semi-Final: Suiseiseki 598 Shana 411
How come Shana got even less votes compared to their battle at round of 32 when this was one of the most hyped battle of the tournament? Haruhi vs. Eri was the clash between 2 greatest fan group in Korea, but that should have helped voter turnout for this match, which Suiseiseki won with less votes than she had during 2 previous rounds. Eri's win against Haruhi was not a controversy, for the large voter turn out was expected and the fact that all School Rumble bounded book has licensed translations out in Korea, thus having 'richer' history compared to Haruhi. Eri was the opponent SOS-dan supporters feared the most and they had to meet her at Semi-final instead of the final.
Final: Suiseiseki 579 Sawachika eri 449
Notice the drop in the number of votes again. School Rumble fans were crying foul about the huge margin. Anti-School Rumble sentiment cannot be the reason as Suiseiseki got less votes than most of the winners in round of 16!
Conclusion: Not only is the lack of transparency disturbing for Japanes SaiMoe, most noticeably inability of outsiders to confirm which votes are legit and which are illegit, there seems to be a dark force trying to make Suiseiseki conquer the world.
Disclaimer: Still, the most logical and easiest explanation is that Suiseiseki is the most popular anime character in the world, right now.