Onmur
Archangel of Nutella.
I think as Veb says, we can trust BrinaAutoPilot more nowadays.[X] Pull Mami into the best hug you can manage, and just hold it. Heads on shoulders is ideal.
[X] Quietly encourage her. Use light pushes to move her forward if she stumbles; if she hits a wall, ask if she'll talk to you about how she's feeling, and make counterarguments or counter-assertions to whatever negative issues are preventing her from holding the conversation. If at any point she either can't or does not want to continue, take over.
-[X] Avoid negative conversational turns. Example, one possible response to Kazusa's question is "Kyubey betrayed me." Push instead in a direction such as "I have a team now." Keep Mami thinking positive as much as possible.
-[X] There will inevitably be pauses in the conversation from Mami's end -- run interference as needed with statements such as "just a moment, please."
-[X] Keep Mami's gem clean.
-[X] Quiet reassurances should be fit in where they seem well-placed. We're here for her.
So, less details.
[] Quietly encourage and reassure Mami.
-[] Avoid negative conversational turns. Help Mami think positive.
-[] Cover for Mami if necessary.
-[] Extra attention to her Soul Gem.