Serena Vonda is a character mentioned in Mackenzie King's blog. She is described as a second year recruit at Athena Astronautics, and told King that UFO fanatics were reading her blog. It is possible Samantha Manus was one of these fanatics.
In the game from which Athena Astronautics and other websites was advertising for, Metroid Prime 2: Echoes, there is a soldier from Squad Bravo named LCPL R. Vonda. This could imply a relation between the two.