I just don't get it

What do you need to raise telekinesis?
I just came out of silver cave and rescued Glen and in silver cave, where some items where that i tried to get and Rayanne kept saying her mind isn't strong enough.
She is equipped with Noble Bow, Perlinpinpin Powder, Spirit Bandana, Hyberbole Gown, and Fairy Earrings. Her stats are Level 42, Mdf 135, Pdf 108 and Mnd 1873.
What am I suppose to raise to get her telekinesis stronger Mnd or Mdf?
Thanks for any help on this. By the way this is the 2nd time I am playing this and I am on easy mode.
I just came out of silver cave and rescued Glen and in silver cave, where some items where that i tried to get and Rayanne kept saying her mind isn't strong enough.
She is equipped with Noble Bow, Perlinpinpin Powder, Spirit Bandana, Hyberbole Gown, and Fairy Earrings. Her stats are Level 42, Mdf 135, Pdf 108 and Mnd 1873.
What am I suppose to raise to get her telekinesis stronger Mnd or Mdf?
Thanks for any help on this. By the way this is the 2nd time I am playing this and I am on easy mode.