[Genshin Impact] I’m Hailed as the God of Mouths and Take Teyvat by Storm

On some day in some year, someone, heartbroken, reached out with trembling hands and shakily posted a help request on the Akasha Forum:

Help: I accidentally spilled the beans about some big shots, and now all of Teyvat is hunting me down. Is there any hope for me? Sob sob

Post 1:

Whatever happened, private assassination attempts are wrong! Did you report it to the Matra and ask them to protect you? P.S. What did you spill? Let us hear it too.

Original poster:

But I'm one of the people under special investigation by the Matra, sob sob sob. What do I do? P.S. Is this really something I can tell you?

Post 2:

Holy crap, what did you do to end up under special investigation?

Original poster:

Uh, in Mondstadt I told everyone their Anemo Archon was a drunk who only knew how to go "ehe te nandayo." In Liyue I told a certain hapless coworker that the Geo Archon was right beside him. In Sumeru... Uh, do you want me to keep going?

Post 3:

You're just making that up. Nobody would believe you.

Post 4:

Wait, OP, are you that legendary Sass Beian, the one they call the Mouth of God?

1. The girl's skill is that when other people ask her questions, every answer she gives is the opposite of the truth.

2. She may complain about him, but she loves her brother, and he loves her too.

3. This is mainly a story about friendship and family.

4. I'll change the title and blurb if I come up with something better.

Theme: Your thesis isn't the only thing that can make you angry. Your brother can too.