Crest

The crest is a symbol which members of the Tron Family have on their bodies. III's crest is green and on his left hand, IV's and Tron's crests are purple and on their right hand, and V's crest is blue and on his forehead. Whenever used, it glows and makes a strange noise.

Behavior
When a Duel starts, the crest appears on the owner's respective body part. It allows the owner to resist the influence of the "Numbers". The crest also prevents "Number" cards being taken away from the owner. Same seen when Kaito Tenjo's Photon Hand technique is nullified by IV's crest, or III's which protected him from Astral.

The owner is also able to literally disappear while using this symbol (IV disappeared with a wind gust, while III with a blinding light). A crest can open some kind of portal.

V's crest is shown to be able to perform any actions with the help of his mind, such as taking control of someone or levitating someone

When Tron gained the ability to produce a small, but strong energy ball after the ritual, he was able to use his own Crest to control it.

Trivia

 * In order to obtain Haruto Tenjo's powers, Tron initiated a ritual to transfer his powers to himself, which created a mark resembling his own crest.


 * The hues of the crests are identical to the colors of Team Ragnaroks' Rune Eyes in Yu-Gi-Oh! 5D's.


 * When the crests light up, they make a similar noise to the Signer birthmarks in Yu-Gi-Oh! 5D's.