Spark Signal

Spark Signal is one of Academy City's Dark Organization's whose level of secrecy is similar to that of Hound Dog or GROUP.

Spark Signal was created for the purpose of dealing with people from Academy City who was trying to sell out secrets towards the outside world.

DRAGON(≠Angel) Arc
By the time of Volume 19 they have revolted against Academy City and started a strange seizing operation incident where they occupy the largest particle accelerator of the world which is situated inside the city, the Hula Hoop. They would held hostage around 30 primary school students, captured from an astronomy field trip; along with their teacher and driver they act as a ‘bargaining chip’ for use against the higher ups.

The group strategies take foundations on the concept that "Espers are still human" and thus aim to create viable counter measures by properly analyzing the enemy tactics and taking advantage of their "human weakness", in their activities Spark Signal had fought with powerful espers countless times... So, when facing Espers that can create incredible phenomena they can still respond appropriately "First calmly analyze the opponent, then find a way to defeat him". Their battle tactics were of no use against against the Accelerator's cold, efficient and ruthless assault and the group would be completely decimated by the level 5 in 300 seconds. In the same fashion of Hound Dog, Spark Signal displayed tactics which included only warfare strategies and regular weapons instead of the usage of Ability Users or customized prototype weapons.

The group carefully made the plan that included the Hula Hoop and put into it all of their efforts and resources ; the demand that they made to Academy City was "disclose all of the information you posses about DRAGON ", GROUP noted how ironically the higher ups used them to get rid of a team who's purpose for rebelling resemble their own hidden agenda.