Palden Lhamo
It is said that Palden Lhamo, as the female guardian spirit of the Lhamo Latso promised the 1st Dalai Lama in one of his visions "that she would protect the reincarnation lineage of the Dalai Lamas." Ever since the time of the 2nd Dalai Lama, who formalised the system, the regents and other monks have gone to the lake to seek guidance on choosing the next reincarnation through visions while meditating there.