Why?

The warfare against the Heligav race ended in a dissatisfying manner and everyone returned back to their residence.

Nial wanted to see how his father was doing because he was a bit worried about his condition.

However, while flying home, Nial passed by Miranda and Mathias' home. Mathias was not at home, which was somewhat unexpected.

And it was only shortly after that Nial found out that Mathias had left the human shelter as well.

"So he gave up?" He wondered at this point, not sure if Mathias had been too weak-willed or if getting beaten up by his friend had hurt his pride.

What Nial realized only when he was back at the base, was that he had received a message through the Originals bracelet.

The message was from Mathias and Nial checked it after a moment.

[By the time you get this message, I would have left already. 

First of all, I want to apologize for blaming you for Miranda's death…