One Day I Will Draw The Rocketship - Tumblr Posts

How did Silverwing earn the title of 'Prince'? Was it connected to a blood line? Or was it due to another reason?

Blackberry Lemonade: This is happening-! We’re going to space!

Silverwing: It is.

Mint Lemonade: Shh.

Princess Luna: Mint Lemonade, Blackberry Lemonade, Silverwing; you three ponies have been selected to start Equestria’s First Expedition to the furthest reaches of the Solar System. This Mission will try every skill you have, but I speak for all of Equestria when I say that you three are destined for success. 

Princess Luna: Silverwing, on this expedition there is a chance you three may encounter peoples and civilizations previously unknown. As my Protégé, I feel that you will be the best candidate to deal with this as it arises.

Princess Luna: By the power vested in me, I do hereby name you Prince Silverwing, Ambassador of Harmony, and all Ponykind.