I went and took down every appearance, action, and word QB has from the first two episodes. I try to describe the scene he is in, but I don't give conversational context--I'd hope people use the timestamps to fill that part in. I am sure this is unnecessarily verbose. Timestamps are taken from Nutbladder's subs.
Spoiler for QB in ep 1:
(1:29) [QB sitting on ledge, speaking to Madoka during Homura's fight.]
(1:54) [Full view of QB from front, he wags his tail as he speaks.] "If you give up, then it's over. But you can change destiny."
(2:07) [Long shot of QB and Madoka from the front. QB is staring forward.] "Unavoidable destruction, grief... [QB turns toward Madoka] You can reject them. You hold that power."
(2:30) [Long shot of QB and Madoka from the back. QB is staring away.] "Of course. So contract with me, [Close up of QB. He bobs his head as he finishes his line.] and become a magical girl!"
(14:43) [Close up of QB's blinking face. QB sitting on an ornamental bush watching Madoka's class do PE]
(16:50) [QB panting as he runs through dark corridors. QB avoids several attacks and does a barrel roll. One hits him, sending him sliding across the floor with his mouth slightly open and his eyes forcefully shut, but he gets up and keeps running.]
(17:23) [Madoka is listening to music. QB calls out to her telepathically] "Help me! Please, help me! (I hear "help me, Madoka" instead of "Please, help me") Help me!"
(17:45) [Madoka is wandering by the closed off area] "Help me!"
(18:09) [Madoka is in the closed off area] "Help me!"
(18:14) [A ceiling panel bends and falls open; QB tumbles down with it. Close up of QB with dischelved fur with red exposed. Madoka picks him up.] "Help me!"
(18:40) [Madoka POV view of QB. QB's has labored breathing and injuries that expose something red underneath.
(19:42) [Madoka and Sayaka run away with QB still in Madoka's arms.
(21:22) [Close shot of QB in Madoka's arms, his eyes are still closed. No injuries are visible from this shot.
(23:27) [QB being healed by Mami. QB with ^ω^ eyes on his face. There are no injuries in the shot, so we do not see these being healed. We see him blink as he wakes up. He faces Mami.] "Thanks, Mami! You saved me!" [Closeup of QB. He turns to face Madoka and Sayaka] "Thanks! I'm Kyubey!" [Back to a wider shot] "Yeah, Madoka Kaname! And Sayaka Miki!" "I came here to ask you something" [Closeup of QB. He smiles and bobs his head to one side as he says:] "I want you to form a contract with me and become magical girls."
To note: QB doesn't bleed. If you look at the close ups when he drops down in front of Madoka and when he is in her arms, injured, the white fur looks like a sheet or cover (or clothes) that has been torn, as it is not stuck to the exposed red portions as you might expect flesh and skin to bunch and peel.
Spoiler for QB in ep 2:
(0:21) [QB hops into Mami's waiting arms.]
(0:32) [QB is sitting motionless, staring in the same direction as Madoka's stuffed animals on her nightstand. Closeup of him as he tilts to one side as he says:] "Good morning, Madoka!"
(2:49) [QB has a ^ω^ look as he lounges in a basin of hot water.]
(3:19) [QB walks into and sits on the floor in Mami's home. QB sits on the floor with the other girls around a coffee table. QB appears on the table after a cut after Mami brings out her Soul Gem]
(4:01) [Close up of QB sitting] I'll fulfill any one of your wishes! [Closer shot of just his face.] It doesn't matter what! I'll make miracles happen! [Back to the previous cut] "But in exchange, those who hold one of these jewels--a Soul Gem-- has the duty to fight witches.
(5:30) [Same QB sitting] "If magical girls are born from wishes, then witches are born from curses." [View from QB's back of Madoka and Sayaka] "If magical girls spread hope, then witches scatter despair. Made all the more horrible in that normal humans can't see them." [Close up of QB] "Unease and suspicion, consumption with rage and hatred. They sow the seeds of catastrophe across the world." [Coffee table group view again. QB is sitting, facing Madoka and Sayaka.] "Witches conceal themselves within a magical barrier, never to show themselves." [Frontal shot of QB again] "Like the labyrinth you two watered into."
(7:14) [QB on Madoka's left shoulder] "Good morning, Sayaka!" [QB with ^ω^ eyes.] "No, I'm just passing messages. It's fine though. nice and convenient!"
(8:49) [QB sitting on Madoka's desk, cocks his head.] "Why would I be?" [Shot including Sayaka and Madoka with QB. He cocks his head back the other way.] "I think I'm safer at school. Mami's here.
(9:41) [QB is lying on his side on the floor in Mami's living room.]
(9:52) [QB is on his side, head resting on one arm with his right eye closed. He props himself up, opening his closed eye, and says.] "She was after me." [He moves into a sitting position.] "I think she wanted to stop a new magical girl from being born."
(11:08) [QB is sleeping on Madoka's bookbag.]
(11:23) [QB opens his mouth for food. ^ω^ eyes as he chews.
(11:43) [QB looks at Sayaka as she asks Madoka about wishes.]
(11:54) [Closeup of QB as he looks at Sayaka to the side] "Wow, I'm surprised. Most girls go right for it."
(12:20) [QB and Madoka look at Sayaka as she talks about them not needing wishes.]
(13:14) [QB is in Madoka's arms as Homura talks to them.]
(14:08) [QB is on Madoka's left shoulder as Madoka and Sayaka talk to Hitomi.]
(14:53) [QB is holding a beefsteak french fry and chewing, involuntarily shuts his eyes as Sayaka whips out her bat.]
(15:43) [QB is on Madoka's left shoulder as they begin their witch hunt. His tail swishes a little as they exit.]
(16:14) [QB has his eyes closed as he rides on Madoka's shoulder.]
(17:35) [QB has his eyes open as they arrive at the witch's hideout.]
(19:37) [QB just looks on with Madoka and Sayaka, unmoving for the rest of the encounter.]
(21:57) [QB moves his head a bit as he says] Don't worry, it's perfectly safe in that form.
(23:11) [QB sits on the ground looking at Mami and the jumper.]
(23:53) [QB is sleeping on Madoka's bed with his head tucked into his tail. He moves with his breathing.]
The intent of this is to just have a catalog of what we see him do, what body language he exhibits, his reactions in certain situations, and what he says to accompany those, as these are more concrete to build upon than what he does not say or do, which is more open to interpretation.
I don't think we've seen so much dark imagery with Kyubey that he does not counter with stereotypical mascot fooling around and fidgeting sfx. They've been giving us cues in both directions, but it's been shifting toward more darker cues as of late.
I'll see about doing something similar for ep 3-5, but from a brief rewatch--QB gasps and his body jerks a little (the first time we have seen him without his usual composure?) when Homura enters Charlotte's boss room in the nick of time, although I think someone probably mentioned this already on the episode thread.