Kantai Collectionequipment fairy representing an American M4 Sherman tank modified by the British to be amphibious, through the addition of twin propellers and a "flotation screen" (waterproofed canvas on a lightweight, collapsible frame) that increased its effective displacement. The fairy herself has blonde hair and wears the rounded, olive-green helmet of Allied soldiers in WWII.
The official art contains a historical inaccuracy in that the fairy is shown sitting on top of the flotation screen. In reality, the screens were open on top and were not rigid.