Tsongkhapa is the founder of the Gelukpa School and is the central figure in their Refuge Tree. He is dressed as a monk and wears the yellow pandita hat this lineage has become associated with.
Kubera is the lord of wealth and guardian of the Northern Direction. According the Hindu mythology, he is said to have performed austerities for a thousand years.
Lokeshvara is one who refuses to accept Nirvana since he considers such acceptance selfish in view of the ignorance of the great majority of the people who have not yet attained that stage.