Nightwing

Nightwing is an individual that crossed path with Guillermo Barrera and becomes enemies.

Early life
At some point before 2013, Nightwing crossed path Guillermo Barrera and ended up being enemies.

At some point he became one of the A.R.G.U.S. priority target after the Hood.

Barrera death
On 27 February 2013 at 01:16, on a file report of Guillermo Barrera's death, it was written on a note that they must beware of possible interference from Nightwing and the Hood.