Gamera is a kaiju originating from a series of Japanese tokusatsu films of the same name. Gamera first appeared in Daiei Film's 1965 film Gamera, the Giant Monster, which was initially produced to rival the success of Toho's Godzilla.
There are roughly one-sh*t billion tropes so PLEASE look through them before adding one. Otherwise add what you like. ADDITION: PLEASE read through the trope description provided before submitting something. It's not a huge deal but too often people submit characters that don't fit just because they misinterpreted the title...