The trailer for the fifth episode of The Fallen & The Virtuous: Tri-Brigade Kitt, has been released:

The episode will premiere on October 24th, 19:00 (JST)

The new cast members are:
Kitt: Yuu Serizawa
Sargas: Kenta Miyake
Rockey: Chinatsu Akasaki

The official OCG twitter has posted reference art for Rockey, and a comment from its voice actor:

“I’m Chinatsu Akasaki, the voice for Springans Rockey.
The Springans look very similar, but each one is slightly unique.
They look noisy, but they are also very cute!
And as for their real form…?
Make sure to keep in a eye on the adventures of the mischievous and merry Springans!!”

Sources: 1, 2

And also for Kitt and her voice actor:

“”I’m Yuu Serizawa, and I play Kitt!
I’m very happy about being able to be part of a franchise with such a rich history like Yu-Gi-Oh! !
Kitt is a cheerful and energetic girl who brings a smile to everyone in this Story of White. I hope I can bring a smile to all of you as well! Thank you for this opportunity!””

Source: 1, 2