Isiah stood fast when he saw that succubus walk away from that gathering, he was feeling a bit tired as a side effect of losing blood to that vampire and also because of her compulsion when she touched him.
Yet when he got the chance to escape, he just stood and started to run away, the creatures were looking at him as if they were looking at something to eat and he didn't want to end up in their stomachs.
'I need to learn their language so that I could understand what they are saying, I think that the grimoire is written too in their language so yeah I have to learn that any time soon"
Not all the vampires followed him, mostly they were terrified by what happened to their friend and they didn't want to get anywhere near him because only his presence in this place was a mystery.
Isiah was not that fast, he was running as if his life was depending on it yet the vampire reached out to him almost immediately because he was faster than him.