- "Thanks again, everybody. I'm proud to call you all my family. With this room, I feel like I fit in more, as one of you guys."
- ―Zack, after the family sets up his new room
One of Us? is the seventh and penultimate comic in Season 9 of Sibling Rivalries, and the 74th comic total.
Packie and Francis take Zack for a day out doing their favorite activities, but they realize despite loving one another, Zack does not really have a lot in common with the McRearys.
♥ = character's debut
♠ = character does not speak throughout comic (does not apply to Claude)
♣ = character is mentioned only
♦ = character appear in a speaking/non-speaking cameo only
- Patrick McReary
- Francis McReary
- Gerald McReary
- Derrick McReary
- Kate McReary
- Zack Marshall
- Maureen McReary-Wilson
- Hector Wilson
- Spencer The Dog
McReary Extended Family
McReary Siblings' Friends
- Salvador Ventura
- Angel Chacon ♦
- Claude Tena ♣
- Salvador Martinez
- Tony Gonzales
- Jose Gonzales
- Steve Madison ♦
- Zoe Torres ♦
- Lacey Marshall ♣
- Zack's two baby turtles
- Claude ♥
- Toby ♥
- As of this comic, Zack now lives in the guest room of the house, which previously appeared in the Season 5 comic "Uncle Cameron Moves In". The sub-plot of the comic focuses on Hector, Maureen, and the younger siblings renovating the guest room into Zack's own room.
- Third comic to end in a question mark, after "Do You Get The Message?" (which is also a season finale) and "Wouldn't It Be Nice?".
- The title is both a reference to the 2017 film One of Us, and the "one of us, one of us" chant scene from the 1932 film Freaks. In this case, the title references Zack struggling to become one of the McReary siblings despite his many differences.
- Third comic since "Great Balls of Paint" and "Pack To The Future" to feature Aaron's Paintball Palace. In the first appearance, it was 5 v 5 (the five McReary siblings versus Joel, James, Marco, Trevor, and Jose though Jose forfeits), but in this comic there was only a 4 v 4 (Packie, Francis, Zack, and Salvador V versus Joel, James, Marco, and Trevor) for some reason.
- In this comic, there is a scene where Packie, Francis, and Zack compete in a laser tag battle against San Salvador, Tony, and Jose. Jose is oddly going against the McRearys in this comic (despite apologizing and saying they are still his friends, before eliminating Packie), but in "Great Balls of Paint" he did not want to battle them in paintball at all.
- Zack gets two baby pet red-eared slider turtles in this comic, which are both males and named Claude and Toby. In real life, GTA Nerd has two turtles with the same names. It is explained Zack had the name Claude in his head way before he knew about Salvador V's step-brother. In GTA Nerd's case, he named both the SR character and turtle after the Claude from Grand Theft Auto III.