Time Line of The Sun Princess
 
On the left is when she and Luna are still too young to get their tattoo mark and is living with their parents King Cosmo and Queen Galaxia.  
On the second left when she and Luna got their tattoo mark’s of the Sun and Moon but then to find out that their parents where killed by Gorgon The Lord Of Darkness and Evil.  
On the second right is when she and Luna became the rulers of Equestria, when she and Luna turned Discord into Stone, when her and Luna turned Evil King Sombra into shadow thus banishing him to the frozen north, when she banished her sister to the Moon, when she fell in love with Good King Sombra and when her and Luna’s teacher/mentor/adopted father Starswirl The Bearded Vanished with the Pillars.  
On the right is when she became Sunset Shimmers teacher but Sunset turned against her thus went into the other world, Twilight Sparkles teacher, became Cadence and Bluebloods aunt, reunited with her sister Luna, forgave Discord after Fluttershy reformed him and got back together with Good King Sombra.
 
This was made and credit goe’s to Kisakae2 flash game (c)  
Princess Celestia belongs to The Hub, Hasbro and Lauren Faust (c)