The final two teams in the competition is a repeat of Mizusawa vs. Hokuo.  Chihaya wants to challenge them straight up, no tricks.  A player on the Hokuo team will make sure it happens.
She was being cautious since 
she doesn't know this reader.
Tenía cuidado ya que no conoce al lector.
Tenía cuidado ya que no conoce al lector.
Estava sendo cautelosa, já que 
não está acostumada ao leitor.