nico nico douga MADs based around Puella Magi Madoka Magica with a focus on Mami Tomoe and her famous lines:
https://dic.nicovideo.jp/a/もう何も恐くない(Video 1) Episode 3, 18:41 -> I'm not scared of anything anymore.
https://wiki.puella-magi.net/Madoka_Magica_Episode_3:_I%27m_Not_Afraid_of_Anything_Anymorehttps://dic.nicovideo.jp/a/死ぬしかないじゃないシリーズ(Video 2) Episode 10, 14:22 -> If the Soul Gems give birth to witches... then we have no choice but to die!
https://wiki.puella-magi.net/Madoka_Magica_Episode_10:_I_Won%27t_Rely_On_Anyone_Anymore#Timeline_3Both of these were extensively parodied:
The 1st one because of how Mami's emotional relief is surrounded by red flags moments before that foreshadow her death where the MADs usually try to play around to the buildup of that scene.
The 2nd one because of how each character in the scene kind of plays a unique and essential role in the videos: Mami being the emotional instigator that starts the video with her sudden breakdown. Kyoko being shot and killed right at the start, and in some videos this happens multiple times with her dying helplessly over and over. Homura is usually restrained for the entire time, but plays a role as a kind of chorus or interjection character. Madoka on the other hand waiting behind Mami for the right moment to deliver the finishing shot, acting as the executioner.
Also, another line you're going to frequently hear is Mami's "Tiro Finale" which means "Final Shot" in Italian, and due to her being the only character in the anime to name her special move people began calling her 中二病 -> Chuunibyou -> middle-school second-year syndrome.
https://dic.nicovideo.jp/a/ティロ・フィナーレ