Some kind of mule/donkey familiar that can carry like 1 pages worth of inventory and doesn’t drop while overburdened but causes you to walk like you’re over burdened, spamming pickup is annoying.
+1 but it may be better if the mule/donkey can level up like dogs and as they level up their inventory slots increases and the weight they are able to carry increases. (e.g. Level 1 : 1 inventory slot, Level 2: 2 inventory slot, etc.)