They are characters of the Konpeitou kingdom story.

Confe-chan
1. Princess of the Konpeitou kingdom.
2. Born March 10th
3. Twitter: @confechan

Shiira
1. 1. Prince of Ruby
2. Born May 10th
3. Twitter: @ T4NsTICjke2T3bD

Soruto
1. 1. Prince of Marl
2. Born January 31st
3. Twitter: T4NsTICjke2T3bd

The manga of the Konpeitou kingdom story still continue! 💖