It was just a few days ago that we saw the reveal of Fate/Grand Order Arcade, which included a debut trailer. We've already got a new character addition not in said trailer, though, with Berserker class Servant Kiyohime set to join the roster.
The other characters we know about so far include Mashu Kyrielight (Shielder), Cu Chulainn (Caster), Heracles (Berserker), Atalanata (Archer), and Nero Claudius (Saber). The full roster will be getting detailed 3D character models for the arcade game.
As for the cabinet itself, Type-Moon announced that it will have an on-demand printing system for doling out physical cards to players. Fate/Grand Order Arcade is roughly 10% complete, with Japanese location tests planned for this winter ahead of a 2018 launch.