All we know about him is that Martin Mandho visited him once.
There was, in fact, a very important meeting that people don't pay enough attention to.
The ancient dialogues, I presume (since I believe you have them as visions)
No, he's talking about a mention of "one of the GTVA's most decorated pilots" in the BP prose. I'll quote it below...
In February 2345, Professor Martin Mandho, a major Restoration figure with former ties to the Galactic Terran Intelligence, went into closed retreat with certain spiritual figures popular in the Party.
Two months later, Mandho requested a meeting with one of the GTA’s most decorated pilots, as well as Vasudan survivors of the attack on the Lucifer.
Whatever happened in that meeting galvanized Mandho and the inner circle of the Restoration Project. Two years later, the Project declared itself the Ubuntu Party (taking on the name of an Afro-Asian populist political party that many of its founding members belonged to) and announced its intent to reestablish a system-wide government and take custody of mankind's future.
There's also this:
They appear to date back to Martin Mandho’s 2345 conference with GTA flight corps veterans.
It is rumored that Vasudan survivors of the Lucifer attack are present amongst the Fedayeen.
In a society built on openness, transparence, and general nonviolence, the function of the Fedayeen is unclear and puzzling. The existence of the Fedayeen was a major aspect of the GTVA’s decision to go to war.
So while the most prominent in-game reference to the Fedayeen (aside from the ending) mentions the Vasudans, there's an implication here that Alpha 1 was also involved in the creation of the unit.
Having gone back to read it now, though, I'm more curious about how the Fedayeen were a major reason the GTVA went to war. One, it's surprising that the GTVA knew this unit existed if people within the UEF didn't even know for sure, and two, how is the existence of a black ops unit enough to spark a war of this magnitude?
I'm fixated on the fact that two of the people we know to be involved with the Fedayeen both were known to experience visions: Alpha 1, who in BP canon experienced the Ancient monologues as visions, and Noemi, who has Ken in her head. Not sure what to make of it though...