The central mysteries of the book are left unresolved but I imagine like House of Leaves it is up to the reader to take the evidence available and interpret/communicate it. Who is VM Straka? Jen and Eric have ostensibly opposing interpretations even as late as the red/purple annotations, but they're more complimentary than competitive. It's likely the name is both the cover for the collective efforts of the group of The S (Eric's hypothesis), and the original name of the young man who tried to commit suicide (Jen's hypothesis). Said young man would be the one FX Caldiera falls in love with. Of course there is something dubious in falling in love with someone through their written text and correspondences alone -- I have extensive experience with that -- but there are a few hints that FX Caldiera and VM Straka (the original) met at least a few times.
"[Growing up] is hard and nobody understands." // https://www.homestuck.com/story/2391