Changes
no edit summary
** As a [[Link Monster]], it is the first signature card of a main protagonist to not possess either a [[Level]]/[[Rank]] or a [[DEF]].
*** Assuming that each [[Link Rating]] represents 500 DEF, this card would then be represented with 2000 DEF.
** As a [[Link 4 MonsterCards|Link-4 monster]], it is the first protagonist monster that cannot be summoned with 2 "sacrifices".*** The first time this card's summoned, however, is with '''2''' Link -3 Monsters.
* This monster is named after a [[wikipedia:Firewall (computing)|firewall]], a network security system in computing that monitors and controls the incoming and outgoing network traffic based on predetermined security rules.
** Therefore, this card can represent Yusaku's actions as Playmaker against [[The Knights of Hanoi]]: Protecting the Virtual World against any threat that menaces it.
* This card was the first [[Link 4 Monster Cards|Link -4 monster]] to be released.
* This card has 2 downgraded [[Link 2 Monster Cards|Link -2]] counterparts: "[[Proxy Dragon]]" and "[[Security Dragon]]".
** Their combined ATK, Link Ratings, and [[Link Arrow]]s equal those of this card's.
