After thinking about it thoroughly, Hecathe was a bit surprised to realize that he had thought too much about it.
The answer was simple. It was a bit too simple.
It was something that anyone would be able to see once they tried to imagine themselves in Alphius's shoes.
Alphius didn't want to avenge Orgon nor did he want Hecathe to avenge Alphius himself.
Rather than all that, what Alphius really wanted was revenge.
He wanted revenge against those who had wronged him.
The boy had been hated by everyone for most of his life. He thought he could trust his two friends but while one died in the hands of an ambitious bastard, the other got manipulated and turned against him.
In the end, he was left with no one by his side. Not even the mecha-suits that he created were there to save him. He was left alone to die in the hands of the friend he trusted...
If Hecathe was in his place, he would have also been driven crazy.