MCK mentioned that when one cultivate and Mastered the dharma of
Unconditional Great compassion, they can be known as Guan Shi Yin
Bodhisattva, as Guan Shi Yin Bodhisattva, no need to be one person.
Unconditional Great compassion is the symbolism of Guan Shi Yin
Bodhisattva. just like in our school u have different teachers
teaching different subjects. Unconditional Great compassion is
consider one subject in Buddhadharma, just like Science, Math,
history, geography etc. so u can have more than one teacher
teaching one certain subject. so u can call him/her
Science teacher for example. same as Guan Shi Yin
Bodhisattva.
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I see... but however most people tend to see her as a "person
existing", embodiment of Unconditional Great Compassion