忠 is a Japanese kanji written with 8 strokes, listed here under the keyword “loyalty”. It is built from 中 (in) and 心 (heart). In Remembering the Kanji by James W. Heisig it is frame 648.
On KumiJi Glyph Explorer, open the parts search and type “in” + “heart”. 忠 is among the results, together with every other character containing the same shapes.
Open 忠 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.