I was expecting a LITTLE bit of groping around before someone got it! Congratulations Rantzien!

Seriously, well done to everyone who contributed to solving this, I was amazed it got stuck out as long as it did, so thank you

Well I enjoyed that Rantzien, you're up!

EDIT: Oh, and for reference the title "The Tango Riddle" was meant to refer to the fact that the early lines were designed to move around in pairs. The full solution (its now spread over several pages was):

“The Tango Riddle”

Deserved for breathing life back in, (Shiva)
Stop a giant mastered from within. (Proud Clod)

Cause beginning of life to come to an end, (Ifrit)
Life’s story told in a place to mend. (Kalm)

Responding with dance is slightly strange, (Choco/Mog)
Do spaceship watchers ever change? (people in Rocket Town)

When father’s daughter takes the crown, (Leviathan)
Overlooking two of nine’s hometown. (Mt. Nibel)

Over an unwelcome touch a kind of storm, (Alexander)
Use surer feet or land deformed. (Ancient Forest)

From Alpha to Omega the elements combined,
With a sidewards glance should your path unwind.
Some research done and one more glance,
Just exactly who would love this chance?

1) Break down the individual lines.

2) Notice each pair contains a summon and an event/place.

3) Use the alpha/omega/elements line combined with the fact this is "The tango riddle" to move the lines in pairs into the correct order.

4) Sidewards glance obviously to realize that the information you haven't yet used relates to Cloud's swords (you made this leap sooner than I expected )

5) Once the pairs have been moved to spell CLOUD SWORD, then the swords should automatically be in the correct order for MARRY.

6) Then yes, it was Priscilla I had in mind