Just wondering, but are you aware of MaruMori (see thread here: MaruMori.io & Kitsun.io - [Spring Sale ENDING SOON! Mobile App General Release & MaruDex Cross-Platform OCR Lookup Tool Teaser!] Grammar SRS, In-Depth Grammar Lessons, Reading Exercises, Vocabulary, Kanji and more!) which has a similar “teacher” mascot called Maru? Albeit with no AI involved.