Artist’s description from DA:

*Name:* Starswirl Flicker

Nicknames: Liontail, Swirlie

Gender: Male

Species: Unicorn

Parents: Starlight Glimmer and Trixie Lulamoon

Special Talent: Magic expertise

Personality: Level-headed and modest, despite his parentage. Adores every aspect of magic and what it can do, always wanting to know more.

Bio:

Named after his ancestor, Starswirl excels in magic and plans to pursue knowledge of it for the rest of his life. He finds that all sorts of magic are worth looking into, from the mere stage show techniques to the darkest of spells. He tries to keep a calm, level head around most ponies, but when the topic of magic is brought up his demeanor drops and is replaced by an adorable nerd. 

Fun Facts:

-He’s Twilight Sparkle’s top pupil, though his curiosity for magic is something she’s trying to subtly reign in.

-He’s been close friends with Stella since foalhood, and by extension Flare.