When Maitreya Buddha arrives in the future, he will be accompanied by two other figures, Amoghasiddhi Buddha and Visvapani Bodhisattva. These three will be a trinity similar to the trinity of Shakyamuni Buddha, Amitabha Buddha, and Avalokitesvara Bodhisattva. Maitreya will function as the Nirmanakaya Buddha,Visvapani will represent the Samboghakaya, and Amogasiddhi will be in the Dharmakaya position. In addition, Green Tara will be the consort of Amoghasiddhi.
Little is known about Visvapani Bodhisattva and there are few mentions of him in Buddhist literature. His name comes from Visva, the Sanscrit word for double dorje or vajra. Thus his name means something like “holder of the double dorje”. His color is said to be green, like that of his family Buddha, Amoghasiddi. In a few thangkas of Amoghasiddhi, Visvapani is shown standing at the right of the Buddha and is multicolored, but usually he is depicted as green.
Sanje Elliott, March 2008