She could still use the scroll if she wielded it as a Tome, but then she couldn't use Magic Bolt or any other spell really. I mean, there are Tome users or mages in general who will carry around Scrolls of specific spells that they can't use with their tomes or current types of magic (since as long as one has magical ability, they can use a Scroll if they are able to use that Level of Magic, like if you could cast Basic Intermediate Spells then you could use a Scroll containing one. You can currently cast Cantrips, so you can use a Scroll containing it). 

I recommend that she takes Magic Shield so you can use both Magic Shield and Magic Bolt, so that she'll have attack and defense, but its really up to you what you want to do. 

Note though that using it as a Scroll prevents it from leveling up and growing stronger as well, since you're just using it as an item and not a Skill that you know.