You can use “Translucency Sort Priority” option in detail panel under Rendering category
But this option only work if object has translucent material.
Give your occluding object a translucent material, than set “Translucency Sort Priority” to a value greater than 0 or higher
The result :
Purple jelly will always in front of pink jelly!
Attach a large object (plane is best I think) with a circle transparent material and attach to your player.
The object will follow the player and occlude everything except the transparent area on the object