Renegade Shining Chips
There's a class called the summoner, which is sort of like being a bard except that instead of playing music to buff you get to cast summon spells, and a major feature of the class is the Eidolon, a unique extraplanar creature that you summon which is actually slightly beefier than you, and very likely a better fighter.
There's a variant where instead of summoning a thing with extra stats, you summon the eidolon as sort of a shell around yourself; it doesn't gain its own feats or skills, just replaces your physical ability scores and gives you all the abilities you usually pick for your eidolon.
In this case, I'm flavoring it as a shell made of earth and stone a a much larger humanoid figure, to be able to hit both the small and cute angle and the large and beaty angle. Working pretty well.