bEM meeting in [GER] as support Person

My office colleague was asked to attend a BEM after around 90 days of sick leave. We are between 50–100 people in this company, so there is no works council. He asked me to be there as a support person, and I want to accept for his own safety.

I know that both the CFO and the CEO will be there, and they can get pretty personal. They most likely won’t stay neutral, and any criticism is taken personally.

I am worried that this might have repercussions on my own future in the company — even though I am relatively checked out for various reasons (unkept promises and being extremely overworked, like 250% workload for half a year).

But are there things I have to watch out for, and things I should or can do? Just to help and mitigate a lot of the repercussions for me and my colleague?

And is there something I should tread carefully around?

I know my main role is to document and to keep confidential information confidential, especially regarding sickness. But I fear I am missing something, especially since this is my first time.

Sorry for formatting, wording and typos since I’m on mobile.