Really, if you've been insulted and put down for most of your life, then encounter someone who not only praises you but does it sincerely, it's understandable why Yamashiro is starting to act like this.
What are you doing?We're certainly short on battleships, aren't we.Good thing Yamashiro-san came here, right?So now we have two carriers and one battleship, huh?Indeed.Battleships really are strong!