They are the two protagonists of a story of tragic romance. They appeared briefly in an episode in the classic cartoon my little pony.
 
Valentine’s boyfriend and Valentine flee for either a evil duststorm. The two find their escape attempt made difficult by the rocky terrain and come to an tragic agreement. Valentine’s friend continues the escape attempt, while Valentine stays to prevent their chaser from getting him too.
 
It’s the only story in my little pony with a sad ending.
 
Note:
 
Valentine is the female pony orange color.
 
Valentine’s boyfriend is the male pony blue color.