technically only the language is indigenous, but the script you were reading here not. this is a syllabic script and was invented by an English missionary who wanted to teach the tribes the bible. so he (Evans) came up with these extremely simple phonetic symbols. https://en.wikipedia.org/wiki/Ojibwe_writing_systems

Other missionaries and bible translators came up with their own writing systems also. the very first attempt 200 years earlier also looked interesting. and Larry Wall also had his ideas on this problem.

it is extremely simple, and reminds me on modern Hangul, but is probably more related to japanese. https://omniglot.com/writing/syllabaries.htm