The sketches are by the talented Kurumi Kobayashi, who is known for his work on both God Eater and God Eater 2, and is Lead Character Designer on the new game.
As a personal note, I think Kobayashi-sensei is really nailing the characters for this game, and the sketches are really lovely.
Bandai Namco has been hosting public Code Vein preview events in Japan, and following yesterday’s report, today they released more artwork on the game’s official Twitter account.
We get to see art for all the currently revealed NPC companion characters that will follow us in our adventure, Yakumo, Io, Mia, Louis, Jack and Eva.