Image imported from derpibooru 
Original Description:
 
Backstory of cutters as seen in author’s tweets:  
“So, remember that friend of mine who ordered a poster for his 6 y.o. daughter’s b-day? He asked her about her favorite characters beforehand and passed the info to me. It was “Celestia, Luna and Cutters”. I was like “who tf is Cutters?” “Maybe a character from the new generation? So I told him to ask again. Turned out he misheard or misremembered Cadance’s name as Cutters. @Midnight_Blaze_ had a field day and came up with Cutters’s idea.”