No, Roger is Valkenhayn.
Arakune could be the potheads, but that spot is already taken by HYPE DOG ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF ARF
Since you're not making him GSD, you could make Jubei Grubeck.
Tsubaki could be either Ophelia or Grandis.