(Those individuals are truly despicable and inviting their own demise!)
Zero thought disdainfully.
Zero already knew the complete truth behind the decision to send Hiro and the others. While the stated reason may have been to help them grow stronger, the truth was that some people actually wished for them to die.
However, there were also others who genuinely believed that they needed to experience such a war in order to exponentially grow and assist in maintaining peace for humans. Without a convincing reason, those with malicious intent toward Hiro would never have succeeded in sending them to the battlefield.
Naturally, Hiro's companions—Lisa, Zion, and Sylvia—would accompany him since they always worked together. They didn't want to abandon him, and they also believed that they were contributing something valuable to humanity.