Yu Yu Hakusho Chapter 9 Discussion

I really don't get how changing the hairstyle makes other people not recognize you. LOL.

Pretty sure it was just Keiko and his mother he couldn't talk to. But even though he didn't talk to her really it feels like it should count because at the end she knew it was him.

Glad he came to rescue her but I knew he would be able to, though its to bad he ran out of living time..

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                        so why exactly does this not qualify as talking to her? and wasn't he forbidden from talking to anyone from his old life, not just Keiko and his mother? there were plenty of ways for him to avoid being discovered after rescuing her :/