There's this one MMD motion maker whose passwords are like this and they make me viscerally angry every time I have to decipher them rofl.
The password hint was
パスワードは動画中に登場する曲名をはんかくかたかな+色です。(計6文字)
The password is the song title appearing in the video in half-width katakana plus a color. (Total of 6 characters)
And the answer
アンデッド青
This was the easiest one (after I remembered how to enter half-width kana lol) on their channel. The rest were like
パスワードの最後に口に含んだカラスの数を入れてください。(全角計3字)
The password is the number of crows held in the character's mouth at the end. (Total of 3 full-width characters)
I never figured it out... Wasn't one, 001, 001, 01羽, いち羽, 01わ, いちわ, イチワ, etc.
Just sat there like