It'll be okay. We'll find the big wraith. And you'll definetely get your power back. ...Are you worried? Of course. You've got me by your side, Homura-chan.
...Say, Homura-chan. What do you think of me... Truly? That's not it. I'm not the real one, but I still am Madoka. Do you not feel anything... Despite spending all this time with me? ...Heh heh. That's what I thought. You're wrong, Homura-chan. The reason you don't feel anything when you don't see me... ...Is because you're missing most of your heart. ..Wait- don't tell me... ....Did you really not notice? I'm sure you felt it was odd the moment you met me. Even if I am an impostor, Madoka, the person you've wanted so much to see, was standing in front of you. And yet, you didn't feel a shred of happiness. That's because the wraith took most of your heart when it took your energy. Because you're missing your feelings for Madoka, even if you see me, even if you touch me... You don't feel anything, Homura-chan.
Homura-chan. You're not convincing anyone. The fact that you deny it is proof. Your feelings and your actions are all askew, Homura-chan. Even though you remember your affection for Madoka and your commitment to your role. Doesn't it scare you, Homura-chan? Watching your feelings for your only friend fade away? ...And that's how you'll keep twisting and warping the world, Homura-chan. I know your secret. I know you're avoiding Mami-san and Kyouko-chan... No. You're avoiding everyone in this world who has no memory of Madoka. You're really afraid, aren't you? A world without Madoka... if you ever got used to the world where Madoka never existed... Even you might forget Madoka. Even you might accept that Madoka isn't here. Because of Madoka's wish, a new world was born, and there are no witches. It's a world of salvation for magical girls, but... To you Homura-chan, it's a world where you're alone with no friends. The world is even emptier... Even lonelier than it used to be. Your heart is still living in a different world from everyone else. Homura-chan, don't you secretly think... That you'd rather live in the world with witches? Rather than this world without witches?
„
~ Wraith Madoka revealing Homura's insecurities
“
...Heh. That's right. I'm not Madoka. I'm a Wraith. ...I'm also part of your heart, Homura-chan.
„
“
...I'm sorry to make you wait. I've come to help you. We're inside your soul gem. I've temporarily cut us off from the outside world. It's all right. I'm not your enemy. I'm the part of your magic that was taken by the wraith. I'd been watching you two from inside the wraith. When wraith Madoka's body was destroyed, I was released and returned to you. You can think of me as a piece of your soul. When the wraith absorbed part of your magic... I intervened and guided the wraith to your side. ...I still wasn't able to fully control the wraith... ...so in the end, it took some brute force to get back to you... That was done at my instruction. My aim was to gain the power to fight the mutant wraith... ...By temporarily taking all the magic inside your body. Then, by facing off against the mutant wraiths... ...And allowing the wraith body to be destroyed in battle, I thought I could get the magic back to you. There was no guarantee it would work. But I had no other option. And since I'm back in you, that's all that matters.
Wraith Madoka is a mutant wraith from the Wraith Arc of Puella Magi Madoka Magica manga. Despite being a wraith, she is the only one that is not a direct antagonist and rather helps Homura Akemi and the other magical girls.
This dropdown contains the synopsis of Wraith Madoka’s story. Read at your own risk as you may be spoiled otherwise!
After Homura gets all of her magic absorbed from the wraiths, a bunch of mutant wraiths resembling characters that have died start appearing around the magical girls, with the one resembling Madoka Kaname appering before Homura Akemi, though this wraith was noticeably different from the others, not attacking Homura Akemi and instead asking her help in defeating the giant wraith that stole her magic.
She explains that Wraiths collect the emotional energy of humans and nullifies it to maintain a balance in the world as too much emotional energy released can cause the world and the heavens to flip, however through absorbing Homura's magic, the witch in her shield, Kriemhild Gretchen, had curse energy that they could not nullify and started corrupting the wraiths.
Homura agrees to help her, with them looking for the witch, after they fail to find it, Wraith Madoka reveals an unsettling truth to Homura. Her feelings and love for Madoka Kaname are gone. After revealing this fact, Homura starts to question if Madoka Kaname ever even actually existed, falling to despair and asking Wraith Madoka to take all of her emotions, with Wraith Madoka doing so. After this, the other magical girls, Mami Tomoe and Kyoko Sakura are busy fighting against Mutant Wraiths when Wraith Madoka comes to help them, showing them to be the only unique wraith willing to help the magical girls.
She explains to both of the magical girls what the giant wraith is and how much of a danger and threat it is to the world, with her going to fight it together with Mami after Kyoko dies from the Spindle Witch grabbing her and sucking out her soul. During the fight Wraith Madoka cannot defeat the Spindle Witch and ultimately gets destroyed, re-awakening Homura's feelings for Madoka and sending her into her soul gem where she directly speaks with her own magic.
There it's revealed by her own magic that she was mainly possessing the Madoka wraith which is why it acted as an ally and planned to have it be destroyed so the magic could be returned to Homura, for this she needed to take all of the magic out of Homura.
Intelligence: At least Below Average (While she is capable of explaining emotions and why the wraiths collect them, she has a hard time grasping concepts such as hope and despair, being unable to explain emotions correctly)
Bow: With her bow, she can fire arrows of energy to attack with and even fire several at once to attack several enemies.
Notable Techniques
Energy Bow: With her bow, she can fire arrows of energy to attack with and even fire several at once to attack several enemies.
Connect: A technique used by Magical Girls in Magia Record. By joining hands, they are able to fuse their weapons and make a strong variant based on them.
Other
Standard Tactics: Has shown to dodge attacks and use their bow shooting energy arrows.
Weaknesses: Nothing notable.
Trivia
Despite the actual Madoka Kaname prior to becoming one with the Law of Cycles not knowing about Homura Akemi's love for her, the Wraith Madoka knows this very well, very likely due to having Homura's magic inside of her.
Wraith Madoka was based on the image of Madoka Kaname that was inside of Homura Akemi's own mind, with her constant changing personality being due to Homura struggling to know what her idea of a normal Madoka would be due to her idolization of her.
References
↑Note: While Ultimate Madoka's witch was going to eventually become 2-C, the initial form of the witch just massively upscaled from Madoka Kaname from the previous timeline