Sabian scores a hit on the zombie, cutting through muscle, but not a killing blow on the previously-uninjured undead. Cassandra awakens Mustafar, who coughs and cautiously moves inside the room (dodge action since no post).
The three skeletons fire arrows at Sabian as they advance, nimbly bypassing the bonfire.
Spoiler
S4 (1d20+4)[21] or (1d20+4)[14] for (1d6+2)[4]
S5 (1d20+4)[16] or (1d20+4)[13] for (1d6+2)[7]
S6 (1d20+4)[21] or (1d20+4)[24] for (1d6+2)[6]
S4 bonfire (1d8)[6] dex save (1d20+2)[19] save
S5 bonfire (1d8)[5] dex save (1d20+2)[15] save
=> Vidrik, Chloe