- Mel "Tall Bat"
A tall, purple-grey bat with long, black hair; typically shown wearing a plaid shirt, jeans and trucker cap, and smoking a cigarette. Mel is seemingly the leader of the band, being responsible for the majority of the band's tweets, which are typically aggressive. She is very protective of Molly.
- Molly "Fat Bat"
A short, pink bat with lighter pink pompadour hairstyle and white chest fluff; typically depicted wearing a t-shirt, skirt and leggings, sometimes with an eyepatch over her left eye. Molly appears to have a softer and more playful personality compared to Mel. She is also an artist, having drawn the cover art of at least one of the band's singles.
- We Are Bat Ass (EP, 2019)
- ThatsBatAss. "Tweet". February 13, 2019. Retrieved on January 5, 2022.
- Bat Ass. "We Are Bat Ass". December 17, 2019. Bandcamp. Archived from the original on December 10, 2020. Retrieved on January 5, 2022.
- ThatsBatAss. "Tweet". March 2, 2019. Retrieved on January 5, 2022.
- ThatsBatAss. "Tweet". March 3, 2019. Retrieved on January 5, 2022.
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