Blake Lively & Ambruster [ns]

Hi everyone! I'm working on creating a piece for the pride zine and I was wondering if anyone knows which episode has the description of Ambruster and them talking about their time in the war? I want to make a piece with these two and want to make sure I capture their chaotic gun kata essence! Currently I'm imagining him looking like an Alfred looking butler type right now. But I'd also love to hear what people's head cannon is for what he looks like!