Her name means "Rainbow"
The coloring of a striking ocular tableaux
Able to redress or bless
The namesake of a Greek goddess
A messenger doing the bidding of each God
Optically representing truth or facade
Bursting forth from a vibrant pallete
A radiant shower
A rich kaleidoscopic flower
Holographically, hues entangle
Depending on the light shone on each angle
Iridescent.

His name means "Merchant"
Ways and means, he'll craftily supplant
Derived from the Latin tongue
As a full mirrored reflection, he sprung
A messenger to each Roman God
Swift of feet, nimbly shod
Also representing a celestial globe
And as a tool for a calibrated probe
A thermal test
Better read than guessed
Hg on the periodic table
Erratic and unstable
Mercurial.