Seriously, everybody keeps underestimating Vista. Nobody seems to think much of the youngest Ward, but she is a badass and what she can do to Leviathan she could also do to you!
Yeah, sheesh! Even mr. Leg “people are stronger than they appear” End didn’t seem to take her seriously, though that was while under the effects of the miasma.
Vista was introduced as one of the kids who keep the myth of young triggerers being more powerful alive, but not a lot of characters seem to treat her that way.
Maybe it’s because they don’t expect her to be competent, just powerful.