Motifs

What the fuck is a Motif?
A motif is a recurring pattern, it can be a repeated visual effect, a part of a song, or anything really. They are similar to Parallels.

Flowers
Flowers are often used to represent characters, particularly residents of the Original Universe. The first one to do this was Miles, with his buttercups. This, paired with a piece of art drawn by SinFrog, earned him the nickname 'Les Buttercup'.
 * Needlemouse: Blue Flower
 * Venice: Jasmine
 * Terios: Black Orchid
 * Tiara: Almond
 * Miles: Buttercup
 * Classic Amy (and all other Amy's, really): Red/Pink Rose

Fire
Fire is often used to represent destruction and death, as well as the [͏͏R̵̕͜͢E̵̕҉̡́D̷҉̵̷͘A̛͘͢͞C̴͡T̶̸̛͟E̷҉̧͢D̷̡҉̢]̸̶̡͡ of Infinite.
 * Infinite
 * Fireball
 * Fleetway
 * Cosmo (Burning plants, specifically)

Butterflies
Butterflies are often used to represent reflection. memories and looking back at one's personal growth.
 * Butterflies appear in the Reflection Room, showing appropriate images and videos that relate to the memories or traumas being dealt with.
 * When Naka found Cosmo, she was surrounded by butterflies to represent Naka's reflection on himself, the thing that led him to her. Cosmo was also in a state of remembrance/mourning.

Gold
Gold is used to represent Taoks and Klour.
 * Klour
 * Shikurai
 * Inet

The Sun
The Sun has both positive and negative connotations.

Positive (a distant sun, sunset):

 * Warmth
 * Safety
 * Ess

Negative (a dying, close up sun):

 * Death
 * The end of the world
 * Infinite

Birds
Birds represent freedom, liberation and not being tied down to any responsibility.
 * Ess

Musical Motifs
Musical motifs are used in The House of Needlemouse OST to represent individual characters. Each character has at least one musical motif for use, from Sonic songs, original songs and even some from other media.