Zachary Dean Callison, simply known as Zach Callison, is an American voice, television, and film actor. He voices Steven Universe, Onion, the Watermelon Stevens, Patient #2 from "Nightmare Hospital", Melon Mutt from "Super Watermelon Island", one of the Cluster's voices, and Pumpkin in Steven Universe.
- As of the end of Steven Bomb 3, his favorite episodes are "Steven and the Stevens", "Onion Friend" and "Onion Trade"
- His favorite fusion is Sardonyx.
- His favorite character is Ronaldo Fryman.
- His favorite person to have worked with in the voice over business is Jess Harnell.
- He has always wanted to act, as far back as when he was 5 years old.
- It was revealed at SDCC 2016 that he knows some Italian.
- Zach Callison has studied Italian and became fluent.
- Zach stated that out of all the Off Colors, he relates to Padparadscha the most.
- Currently, "Jungle Moon" is the only episode he has not voiced any character in, as it is the only episode in which Steven does not directly appear.
- Zach's Wikipedia Page
- Zach's Official website
- Zach's Twitter
- Zach's YouTube
- Zach's IMDb Page
- Zach's Facebook
- Zach's Instagram