Does anyone know if the number 6 has any kind of significance? Because it sure is appearing a lot within VRAINS.

-There are 6 birds in the OP(which are obviously symbolic of something)

-There were 6 AIs

-6 kids were kidnapped and involved in the Hanoi Project

-which lasted 6 months

-the odd mark on Rev’s hand has 6 triangles

That is a startling number of sixes.

Well Vrains is series #6, there's 3 666 as the sign of the devil, 6 points on a star, 6 main attribites for monsters (fire, water, earth, wind, light, and dark).