I think the implication is that it was actually Kal'tsit's idea? That's the impression I get from the commentary.
It was a quote from Ch.7 Story, where Kal'tsit told Doc that he did make ramen in his mouth pre-amnesiac.. I think this comic just saying that Kal'tsit is just joking with that earlier story...
I was so immersed with the story that I didn't realize I haven't actually encountered this dialogue before.
In what chapter's cutscene does this event happen, and what dialogue choice triggers it?
I don't remember seeing it either, even though I had heard about the doctor's bizarre eating habits long before Ch7 came to EN.
Edit: Found it. 7-6, the "Before" scene. You have to choose
I'm glad you see me as more than a simple battlefield commander.
One of the rare instances where the dialogue choices actually get different responses.
Updated
During the New Year party, the Doctor thought it would be funny to try to make instant ramen in his mouth and burned it all up!!powdered soupKal'tsit-sensei! This is dreadful!!whatahemSenseii!?drip~cou--ghSorry...twitchwhy would anyone try something like that...twitch