Marle is a runaway princess, dressed in clothes that don't fit her title. Her weapon is a crossbow, but I can't say that they are very good. Her healing magic is very good, but her Ice 2 spell is only really good for matching with Flare for Antipode 3, and other double/triple techs. She's good for the lower 50 levels, but you can usually withstand enemy attacks enough after level 50 to not need her healing.