Guardian Star

A Guardian Star is a Monster Card property in Yu-Gi-Oh! Forbidden Memories, based on the Alignments featured in other games. Each monster has a choice of two Guardian Stars, which dictate the element it uses in its battles. Each Guardian Star is named after a celestial body; the sun, the moon or one of the eight extraterrestrial planets in the Solar System, following the classification prior to the 2006 revised definition. Each Guardian Star is strong against one other Star and weak against another one. If a monster battles a monster of a weaker Star, it gains 500 ATK and DFD.

When a player Summons a monster, they choose one of its two Guardian Stars. The CPU opponent always chooses the first of the two. When a battle is viewed in 3-D, the monsters use different attacks depending on their Guardian Star.

The Guardian Stars are as follows:

Guardian Star	Symbol	Alignment	Strong against	Weak against
Mercury	☿	Black Magic	Sun	Venus
Sun	☉	White Magic	Moon	Mercury
Moon	☾	Demon Magic	Venus	Sun
Venus	♀	Illusion Magic	Mercury	Moon
Mars	♂	Fire	Jupiter	Neptune
Jupiter	♃	Forest	Saturn	Mars
Saturn	♄	Wind	Uranus	Jupiter
Uranus	15px	Earth	Pluto	Saturn
Pluto	♇	Thunder	Neptune	Uranus
Neptune	♆	Water	Mars	Pluto

A better demonstration of the above chart is on the next image (red arrows symbolizes "Strong Against").