皇 is a Japanese kanji written with 9 strokes, listed here under the keyword “emperor”. It is built from 王 (king) and 白 (white). In Remembering the Kanji by James W. Heisig it is frame 279.
On KumiJi Glyph Explorer, open the parts search and type “king” + “white”. 皇 is among the results, together with every other character containing the same shapes.
Open 皇 in the interactive kanji search
to expand every part down to its smallest pieces, add your own names and mnemonic stories,
or search for other characters by their parts.