It can be said without a doubt that due to the now infamous Day of Cyrex, Siblings of the Ookami Royal family Prince Airon and Princess Lydia Hikarikaze had a separated life apart, one unaware of their origins and family raised under the confusion on why he is different from his own "parents", while the other other having to grow and adapt with the desire to become stronger in order to avenge, rebuild and protect her kingdom all the while baring the hatred for her father.

Yet even when the two by the chance of fate become reunited and together within the Barrage Squad, interaction and connection is minimal as if the two find it hard to connect, Due to Airon''s social awkwardness and Lydia's otherwise aggressive appearance.

However. Even due to the distance, Lydia strives to protect her brother even so much as taking injuries and even risking her life to protect him, showing that inside that Brutal bulky exterior is a Sister with intent on protecting her family, because.. lets face it, besides Clair the only family Lydia has left is him... and maybe one day they can be open and able to converse to one another like they would have been in a better scenario.