- "The Milderbeast is a scary monster known for eating everything it comes in contact with!"
- ―Angel Chacon
The Curse of the Milderbeast is the seventh comic in Season 1 of Sibling Rivalries, and is the 7th comic overall.
During a night where the McRearys go camping, Francis asks if anybody wants to tell a campfire story. Angel Chacon goes ahead, and tells a story about The Milderbeast, a ferocious creature that eats anything it sees. Kate does not believe that Angel's story is real, but when she runs into the beast in person, she stands corrected.
♥ = character's debut
♠ = character does not speak throughout comic
♣ = character is mentioned only
♦ = character appears in a speaking/non-speaking cameo only
- Patrick McReary
- Francis McReary
- Gerald McReary
- Derrick McReary
- Kate McReary
- Maureen McReary
- Angel Chacon
- Michelle Stone ♠
- Tony Gonzales ♥
- Giovanni Ancelotti ♣
- Jose Gonzales ♦
- Joel Gonzales ♦
- This marks the first appearance of Tony Gonzales, who was pretending to be The Milderbeast Kate sees.
- This is the first comic to take place from the point of view of someone other than Packie for the majority of the comic, in this case it is Kate.
- At the end of the comic, Angel makes up another fictional creature called "The Pegorbeast", which is a reference to Jimmy Pegorino.
- Joel and Jose Gonzales make cameo appearances in this comic.
- The word "milderbeast" is loosely based off the word "wilderbeest", which is a type of animal.