Hifumi Yamada, the SHSL fanfic creator, and easily the wackiest out of all these roles.  Hifumi is basically the embodiment of a sweaty anime fan, he obsesses over 2D girls and is very passionate for his works.  Despite his appearance, he is very much not ashamed of what he has come to be, he's content with it even.  Hifumi's VA requires a nerd-ish nasally sounding voice, but also a lower louder voice that they can whip out for small gags.  He requires good acting and basic singing skills.  For the audition, introduce yourself and just say two of the provided lines.  Also, sing a song you think would fit the character, greatest of luck (you'll need it)!