Card Trivia:Firewall Dragon


 * This monster is the Cover card for Code of the Duelist.


 * This monster is the signature card of Yusaku Fujiki.
 * This monster follows the pattern of main protagonists from their respective series having their respective signature monster possess 2500 ATK.
 * As a Link Monster, it is the first signature card of a main protagonist to not possess either a Level/Rank or a DEF.


 * This monster is likely named after a 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 is the first Link 4 monster to be released.


 * This card has a downgraded Link 2 form: "Proxy Dragon".


 * This monster and "Decode Talker" are the first ace monsters of a spin-off protagonist whose Type is neither Dragon nor Warrior, thus breaking the pattern of the spin-off protagonists' ace monsters (though "Firewall Dragon" does resemble a Dragon and "Decode Talker" does resemble a Warrior, so they only break the pattern semantically).
 * It is also the first time a protagonist uses a newly created Type (in this case, Cyberse).
 * This card eventually replacing the 2300 ATK "Decode Talker" as Yusaku's ace monster mirrors both Jaden Yuki's "Elemental HERO Neos", who eventually replaced the 2100 ATK "Elemental HERO Flame Wingman", and Yusei Fudo's "Stardust Dragon", who eventually replaced the 2300 ATK "Junk Warrior".
 * Therefore the thematics of Firewall Dragon which, focus on recovery and Summoning back monsters to strengthen the field by its presence, can be similar to the effect of "Stardust Dragon" to protect the field from any harmful effect by its presence and Summoning itself back to strengthen the field.
 * Those similarities are also applied to their rival monsters "Topologic Bomber Dragon" and "Red Dragon Archfiend", which are their complete foils and focus mainly to the destruction of the field to reign supreme by itself.
 * This card also opposes "Borreload Dragon", as both monsters feature opposing stances and color schemes similar to "Stardust Dragon" and "Red Dragon Archfiend." Furthermore, their effects also oppose each other, as "Firewall" willingly protects other monsters, while "Borreload" forcefully controls other monsters before sending them to the Graveyard.


 * This monster's first artwork features a pose similar to the artwork of "Stardust Dragon", while its second artwork is the form it "transitions" into in order to attack.


 * This card is the first monster cover card not to appear in the anime before the next booster pack cover card monster.


 * This monster's attack name, "Tempest Attack", is likely named after Transient Electromagnetic Pulse Emanation Standard (TEMPEST) Attacks, which work on the principle of intercepting electromagnetic radiation emissions from electronic devices such as monitors, hard disk and PC memory from a remote location, and allow the replay of the information captured.