This one sentence Chara said to Frisk, made Frisk flirt with the whole Underground....

Not really, I just thought this would be funny to say.

I have no idea if Chara says these exact words, when you get the Faded ribbon.

Frisk os outlined with sharpie, since they are a real person. Chara's colors are not as bright and they are not outlined with a sharpie, since they are a ghost.

I believe Chara helps Frisk throughout the Underground as a ghost, lol.