>>536042779
In Go Rush it was deliberately decided that both the twins would be voiced by rookies since they wanted to sort of pay it forward. Yuhi's VA literally went through puberty as Go Rush was airing.
Since neither Kumagai nor Fukushima had any VA roles prior to Go Rush and the landscape is super competitive they weren't overnight sensations. Kumagai at least has picked up a few "male lead" roles in seasonal anime. Fukushima appears to be more interested in dubbing overseas productions and she is doing that.
While it wasn't her big break I do have to think that Sevens had something to do with Kusunoki scoring her role as Makima, prior to Romin most of her roles were extremely childish and comedic and Romin arguably gave her a more "respectable" character to use as reference material.
Yuga's VA has been getting more lead roles in kodomo anime like Shinkalion and the upcoming Samurai Troopers. Seems to be what he wants to do.