 They have also been shown by some artists to wear white undershirts, the sleeves of which can be seen sometimes under the robe's sleeves.Though their feet are not usually seen beneath their robes, they have been shown to wear red, pointed shoes.It has been said that "Guardians do not take names", yet when Krona invaded Oa in the "War of the Green Lanterns" story-arc, he revealed that all Oans have names but have since forgotten them.