Part of a large family, Ditzy and her twin, Bubbly Doo are the youngest of 6 (Derpy is slightly older). Ditzy Doo was born with Strabismus, and was bullied as a child, her big sisters protected her, Rusty and Boxxy being her best friends before she met a young filly named Golden Harvest, sticking to her like glue, despite Golden Harvest disliking her for a little while, but her attempts to befriend the filly eventually worked out, though Carrot Top (a nickname Ditzy gave her) was still a little rude to her.
If you recognize something, you had [the artist’s] childhood.