Starred in the comic:

Alter Clone Sonic
Alter Night Guard Knuckles
Silent (The Player)

Fun Fact:

The origin of story, started from playing in "Different Dimension" FNaS series, aka. FNaS: Different Dimension (installments: 1, 2, 3, 4/4DLC, 5, 6), which is meant to play more closely to the original FNaS... but still with some extra plot
(more from the player perspective, which is Silent) -> then,

FNaS: Mega Merge Max Mix (UCN / Alternative Maniac Mania) -> then,

FNaS: Insane Immerse, a "replay" of FNaS series but in Modern variation, which is played by installments order from 1 to 6 (not in year order as previously, from 1991 to 2030) and this time, with the literal participation of the player in the pizzerias, being as an avatar in game -> then,

FNaS: Fierce Forces (a mashup FNaF equivalent of: Help Wanted and Security Breach)

Yes, this confirms that Silent has played FNaS 5: Different Dimension as first, aka. Act 0. Second game, was FNaS 1: Different Dimension, aka. Act 1.

Edit: Made an update to the second page:

~ Alter Night Guard Knuckles' cap has been corrected,

~ Little Gremlin Sonic appearance has been updated...
Alter Night Guard Knuckles still tires to shake him off.

Mainly the middle part was inspired/referenced to this comic: