extendid train of thought:
There I am, at a distance
in the calm after perilous chase - coming to the recently decesed queen Brahne (garnets addopted mother) after being chased down the tree by mistidons.

There I come, to assistance
the argenteous danger to face - The party tryes to go and assist the queen who was attacked by kuja on his silver dragon, turning brahne's summon against her.

Spoken of with filial pride
when yearned for man returned - Dagger (dispite everything the queen did to her) speaks of the good traits she had, possibly wished her father was still alive.

Spoken of no more; I hide
in dual infinity turned - the queen is not mentioned again... and this is where i have no guess.