Fast Talker, also known as Short Charge (ショートチャージ, Shōto Chāji?), Fast Cast (ファストキャスト, Fasuto Kyasuto?), Swiftness (行動時間短縮, Kōdō Jikan Tanshuku?), Swiftcast, Chainspell, or CT 0, is a recurring ability in the series which allows characters to cast spells at a much quicker rate. It is often related to magic-based jobs, such as White Mage and Red Mage.
Several Turbo abilities appear for various commands, which reduces the time to use said abilities by 40%. These abilities are Turbo Arcana, Turbo Black Magic, Turbo Bushido, Turbo White Magic, Turbo Instinct, and Turbo Swordplay.
The ability Super Turbo Black Magic instead halves the casting time of Black Magic, as well as allowing the user to cast any Black Magic spell they have learned. All of these abilities are found on accessories and Garment Grids only.
Fast Cast is a job ability exclusive to Red Mages. They first get Fast Cast at level 15 and from then on it will improve every so many levels. Fast cast has two effects, one of which is to decrease the cast time of spells. It also actually reduces the recast time between spells as well. Since a Red Mage usually has the role in a party to use buffs, debuffs, and/or healing, this helps them get more spells out quickly.
This is also one of the primary abilities that makes Red Mage an attractive support job. Many other casters can benefit from quickened casting and recasting times, including Bards, whose songs are affected by the Fast Cast ability.
Fast Cast is related to the other Red Mage ability, Chain Spell.
Swiftcast appears as a Thaumaturge ability available at level 26. When the ability is used, it allows the user to cast one spell with no cast time. The ability can be used by all Disciples of War and Magic and the only jobs that can use the ability are Black Mage, White Mage, Scholar, and Summoner.
Shorten charge time.
Swiftness (also called Short Charge,) is a support ability. It is learned by the Time Mage for 800 JP. Swiftness reduces Charge Time in all CT-related abilities except for Aim, Sing, Dance, and Jump by half.
There is also a dummied out ability called CT 0 that has a cost of 3000 JP assigned to it, but it is not learnable by any jobs. Its effect while equipped removes the charge time from every ability. No units of any kind make use of the ability, and it appears to be a debug tool.