I do know who Pallado is/was.
He was one of the Ithryn Luin (Blue Wizards). He and Alatar traveled to the Eastern lands and were never seen again. Curunir went with them also, but he returned to the western section of Middle-Earth alone. What happened to the twain is unknown, whether they perished, caught by the Dark Lord and taken into his service, or set up cults in the East. All that is known for sure is that only Mithrandir returned to Valinor.
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