Without counting Charles, Rosine is perhaps the youngest apostle introduced in Berserk. She also appears in the 1997 anime along with the other apostles from the first 3 volumes of the manga, and in a small cameo in the third Golden Age movie, flying in her apostle form right into the camera at the end of the Eclipse.

Was the count at the eclipse?

The Count during the fifth Eclipse. On his way to the site of the fifth Eclipse, during the night prior to the event, the Count, along with Rosine and other apostles, feasts on a group of injured Band of the Falcon members, fleeing only after the Skull Knight appears and leaving only Rickert alive.

Is Grunbeld dead?

Both Sigur and Benedicte, who understood and wished to let Grunbeld live, willingly submitted to their fates and were consumed by Grunbeld's flames. Grunbeld, now an Apostle dragon, proceeded to annihilate the Tudor army, killing Abecassis by torturing him slowly before burning him alive.