Hades is the one who took Persephone. Demeter, her mother, noticed she was missing.
Demeter found Persephone with the help of Hecate and Helios.
Most likely, she disappered over the Bermuda triangle. I've heard that they found her plane though.
Hecate was benevolent to Demeter when the goddess was searching for Persephone; and when found, Hecate became the companion-handmaiden of Persephone.
she disappeared
the Spanish killed them by ambush
Buddhism disappered from India over a period of 800 years
Greek myth does not say.
Pacific ocean
Tell me
Demeter is obviously worried and scared for her daughter, and wrathful in mourning and sorrow when she found Zeus had let Hades take for bride their daughter Persephone without her knowledge and consent.
Zeus had promised Hades his daughter Persephone as his wife, Zeus neglected to mention this to Persephone and her mother Demeter; Hades had created a flower for Persephone, and Persephone and her maiden goddess companions found it in exploring a field of flowers, Persephone plucked the flower and Hades thought this a acceptance of his love for her, and took her to his realm where he found out he had kidnapped Persephone (who in some myths isn't at all opposed to being Hades' Queen) and when Demeter ventured into the underworld Hades greeted her and said Persephone was allowed to return if she had not eaten of the food of the underworld - she had, so she spent the winter with Hades and in rest of the year with her mother; it goes differently how long exactly, but winter is the return of the sorrow of Demeter having lost her daughter.
They are involved in the myth in which Hades falls in love with Persephone, and abducts her to the underworld to be his wife. Demeter, who loved her daughter more then anything, stopped doing her job and searched for Persephone. She found her in the Underworld and talked to Zeus. An agreement was made that half the year Persephone is with Demeter (Spring/Summer) and half the year Persephone is with Hades (Fall/Winter)