Souji wants to tell Flavius to relax and not take Minerva too seriously because they aren't going to leave buuut it looks like the words won't reach the poor moogle.

"We won't leave, I promise," Souji tried to reassure him with a smile. "And I agree, I don't think she's mean. Only very strict." A perfectionist. There's some sinking feeling that if he never met people he did in Inaba he would turn out to be like Minerva.

"We'll go get some kupo nuts after. That okay with you?"

Sorry Newt, Souji is trying to relax your Moogle by befriending him.