It's good that Casimero is just keeping his mouth shut at this fight.
Casimero has his mouth shut because he has nothing to say, what would he say? what would he boast about? When fighters have one or more belts, they show off and talk a lot to get more attention from the media and also put psychological pressure on their opponent, it turns out that in this case Casimero has nothing to show off for that reason he can only remain silent and wait for fight day and see if he can win this fight, that's all he can do
Maybe he was being advised not to make too many talks and just do all the talking thru his punches in the actual fight. Akaho, on the other hand, is not giving any trash talks too and I'm sure he wasn't like that, and that may be the reason why Casimero is just silent too.
Akaho also has nothing to say, what would he say? when these fighters always talk about showing off what they have at that moment, something like showing off their belt or because they beat someone very strong and important, then they show off, but in the case of Akaho, he is 36 years old, he failed in previous fights for the heavyweight titles. Junior bantamweight WBC (115 pounds) and bantamweight WBO and Akaho, he doesn't have a good defense something that Casimero can very well take advantage of his weakness in my opinion