Crayon Shinchan Keychain

thingiverse

I'm having trouble rewriting this text. Can I get a rewrite of "Crayon Shin-chan Keychain"? The kanji for "shin" means true, and is used in words such as "sincerity". In Japanese, the key word would be pronounced "SHIN". However, it's difficult to understand when reading "Shinchan", even with correct kanji. Please give me a rewrite of this sentence so that it's grammatically accurate in both languages.