The Emperor though was really did meet of the twin but the truth is that rurahel actually did give birth to triplets baby about that but rurahel had been keep hidden one baby girl information from the emperor knowing about other one baby girl, arjen and arien never heard for having a triplets sibling.

Rurahel went drunk and rurahel doesn't that knew that rurahel split out about information about the other girl was being arjen and arien triplets sibling, arjen and arien was shocked that the twin had an another sister was one of triplets, arjen and arien now realised that arjen and arien are not just a twin but a triplets, after midnight day of rurahel died, arjen and arien was send to the emperor by maid suggesting but maid doesn't knew about arjen and arien had are actually triplets sibling.

Arjen and arien ready to telling to the emperor and the three prince brother:Lloyd, alex and eiji about rurahel had been keep secret from them that was arjen and arien are not just twin but a triplets as the emperor and brothers now knew about rurahel had taken one baby girl somewhere place at that they never will find one baby girl mean arjen, ariel and the other twin sister are same age and height

Arien :"me and arjen are triplets!!" She was in shock hearing she and her brother had another who was tripletes sister, you.

Arjen :"me and arien are triplets!!" He was in shock too

The twin shocked hearing news that arjen and arien are triplets since you got send away by rurahel