Dwarf refers to a person with one of several varieties of a specific genetic condition called dwarfism. A dwarf has disproportion of body parts. This is generally caused by a genetic or nutritional disability. Any adult human below the height of 4'10 (147 cm) is considered a dwarf.
One Piece has a great story and does not have a lot of filler episodes.
Botox and fillers are fine to use regardless of your risk of breast cancer. My advice is to try Botox first, wait 2 weeks, then return for any Botox touch ups and get your fillers. Hope this helps. Take care.