Truth be told it was mostly just cause I like how it sounds. "Colt Ironside". I like the sound. And the Ironside part came as a play on my username. Colt "Big Iron" Ironside. Funny considering she ain't that tall compared to some of the vtuber sonas I've seen. But I didn't really feel like it was necessary to make her taller than needs be. She's gotta earn that Ironside name somehow, very dense physically. Kicks like a horse. Anyways I got away from your question, it was basically just a mix of wordplay and liking how it sounded.