So... that spiderman shirt... (new job tease)

[Alacran]

This is a theory i do not have much faith in. I only put it forth due to the amount of coincidences i feel exist between the the hint, series and crossover event.

This is Emma Guzman she is an Alchemist in a anime show called Honoo No Kokuin also known as Garo.

(fyi... the strings are not always blue...)

A scene of her using a peculiar weapon.
https://www.youtube.com/watch?v=SxKuSn0n6tM

With the Spiderman t-shirt, spider webber comments, and Garo crossover, i feel that there is a very small (microscopic) chance that a version of Alchemist and or Exorcist (Chemist having been a combat class before in the FFT series, "Return to Ivalice") may be something to consider.

While it was stated that a focus was being placed on more traditional aspects of past FF jobs, i feel that may have been mostly in reference to Red Mage and as such not wholly encompassing their design concept for all 4.0 job implementation.

Emma fights with her Spindle Gun(?) by laying fields in which the enemy is ensnared in, once bound the target is then ripped apart by the "strings" of her weapon inflicting major damage. This process is helped along by using charms, and tools to weaken and debuff the enemy before the last snares are placed and subsequently pulled taut.

Again i don't truly think this to be wholly viable, just a few things that seemed to over lap in my head the closer we get StormBlood.