Quick answer — Kouhaku Kuroboshi worked on Kino's Journey (Original Character Design), Princess Principal: ~Crown Handler~ 2 (Original Character Design), Princess Principal: Crown Handler - Chapter 3 (Original Character Design) and 12 more anime.
Kouhaku Kuroboshi worked on Kino's Journey (Original Character Design), Princess Principal: ~Crown Handler~ 2 (Original Character Design), Princess Principal: Crown Handler - Chapter 3 (Original Character Design), Kino no Tabi: the Beautiful World - Byouki no Kuni: For You (Original Character Design), Princess Principal (Original Character Design), Princess Principal: ~Crown Handler~ 1 (Original Character Design), Kino no Tabi: the Beautiful World - Tou no Kuni: Free Lance (Original Character Design), Kino's Journey -the Beautiful World- the Animated Series (Original Character Design) and 7 more.