Grey Co Aldo (グレイ・コ・アルド Gurei Ko Arudo) is an imperial knight assigned under Princess Piña. He also trained the Rose-Order of Knights when they were still kids.
Personality
Grey is depicted as a man with a serious and loyal personality. He often acts as Piña's voice of reason, once suggesting to the princess to simply apologize for the fiasco caused by Bozes when the Rose Knights kidnapped and tortured Itami.
Appearance
As Grey's name suggests, he has very short grey hair as well as grey colored eyes. In the manga he is a chubby man with balding head.
History
He was assigned by the Emperor to guard Piña. Following Piña's wish, at the age of 34, he trained the Rose-Order of Knights.
Plot
Grey is first seen silently sitting in a bar with Piña, where news of the Third Recon Team's encounter with the Flame Dragon is being circulated around the place.
Later, he helps fend off bandits from Italica.