Arvena had gone through a portal, no doubt about it. Timothy wanted to go after her to make sure that she was okay, but then he realized how a terrible idea that was, he realized that it would be too dangerous to follow her, and that was what made him reconsider things! Arvena had read those scrolls for hours before she opened that portal, she was prepared in other words, and Tim feared that if he charged into that portal ‘heroically’, then he might get vaporized one way or the other because he was severely unprepared. It was simply stupid for him to go in there.
Tim even looked at the scrolls close by, to figure out what was going on, but it was hopeless. He couldn’t make out a single word out of them, and with that said he simply backed off, he couldn’t get involved.
“That crazy bitch wasn’t up to anything good anyway,” He tried to console himself.