Its called find it out BY WATCHING YOURSELF.
its episode 4
It is called Konso.
235 I believe
Senna (茜雫, Senna) is a character from the movie Bleach: Memories of Nobody. She is a young Shinigami that Ichigo Kurosaki and Rukia Kuchiki meet in the Human World. She is also the main female protagonist of the movie.[1]
If you are talking about Bleach episode 342, she is not fading away from the world of the living, it's just Ichigo that sees her disappear because he looses his Spirit Energy/Powers in that episode. if this is not what you mean then someone can Improve this Answer.
Human Habitrails. from season 2. episode 5
They first appeared in episode 7 then they went to the human world and they appeard again in episode 14
If I'm not mistaken, it's 114. He stay in the world of the living until 142.
The bleach producers wanted to take a break and get away from the main story with some fillers.
Episode 320; called "Gotei 13, Gathering in the Real World!" (Note: I wouldn't say that Ichigo let them in his room. In fact he protested it. Plus, they actually gathered in the short which is at the end of episode 319 leading to episode 320.)
yes. but he turns half-demon in her dream as well. episode 100
yes,there is