Ants are numerous and they are powerful when together. Unfortunately, it would take thousands if not millions of ants to overwhelm a Kaiju as large as Biollante. Biollante can just use her acid blast to take out the Ant and win the round. It must have been difficult to see her take a loss against Havok in the last match, but it would appear that Biollante has finally regained her momentum. Biollante wins.