A couple of possibilities ..<br/><br/>1 - Wrong place at the wrong time. She just passing by when all hell breaks loose.<br/><br/>2 - Damsel in distress. Shes the main attraction in a demonic summoning ritual, and the others pull her out.<br/><br/>3 - As you mentioned, brought in for her linguistics, and her curiosity means she wants to know more, either gets told, or follows along despite being told not to, and finds herself down the rabbit hole, good and proper :)