According to latest update of SAO HF site, PoH is officially a SAO HF character
They'd again updated the SAO HF story, this time to take into account LC.
A 30s new CM had been posted onto official site
Next official site update would happen at Jan24
checked a real-life copy of the current volume of Dengeki G's Festival Comic, to its side it wrote DAO Anthology, so it is probably the nature of the silica pages found online. Unfortunately because of the magazine is labelled as 18+ and it have a large Asuna Tapestry attached into it, the whole magazine is placed in a plastic bag that couldn't be open without purchasing it and it is costing more than four time over Dengeki Bunko Magazine's price so I hadn't buy it to verify.