Remram as a husband and wife.
They asked their son to differentiate them:
Me (Dad): “Who am I?”
Son: Papa and mama.
Me: “Oh wow! So which one is your dad?”
Son: “This is papa (Rem) and this is mama (Ram)”
……How could my son tell!?!?
They later revealed their identity on Twitter:
They have also cosplayed as other famous charact as a family:
1. Detective Conan