The lightning rod towers seems to be not working properly. You are asked to
calibrate a total of ten rod towers. The rod towers located on the south
part are fairly easy to calibrate, while the ones up on the north are the
ones that are difficult. There are three ways in calibrating the rod towers:
Rikku - input the correct sequence that appears (easy), Paine - input the
correct control from three falling options (moderate, options fall faster
after another), Yuna - memorize the given sequence and input them correctly
(difficult)

The tenth and last tower is located up on the north side and accross a pool
of water. For this tower, it is Yuna's job to calibrate since you're going
to have to do it from afar. After calibrating each tower, you will receive
items for your work, but the items aren't really that much hard to get
anywhere else.