Shi Tong wrote:My question is, who is the Guan Yu/ Gong Gong which we see as a guardian, and always with another character who looks like another military leader? (No, this isn't the Guan Yu that we commonly see with Guan Ping and Zhou Cang!)
Does anyone know what I'm refering to since I find that really interesting- there are so many types!
It is likely that the character you are talking about is Skanda Bodhisattva(韋馱菩薩). He is a commonly depicted as a white faced, young general.
As you may know, Guan Yu is also revered in Buddhism (in addition to his Taoism incarnation, Guan Di), and he is known as the Sangharama Bodhisattva (伽藍菩薩), or the protector of the law.
Skanda is also a protector of the law, and for this reason in buddhist temples, he is shown in pairs with Guan Yu.
BTW, I know from your past postings you have been to Lung Shan Temple in Taipei. You can see both Skanda and Sangharama at the doors in one of the gates there.