Yonah Nibellis's Links
On the other side of the spectrum, Yonah can absolutely see that Tsubame is a showoff, but keeps watching her to see when she beefs it. Tsubame's likely helped Yonah with heisting in certain places, which Yonah can respect. Now that they're trapped together, though, things might get a little stir crazy.
Tsubame thinks Yonah is extremely cool, and wants to outdo them in every way. This ends up making Tsubame a bit of a showoff, but she's capable of accepting her losses when things don't go as planned. That said, her trust towards Yonah was mixed - while she knew she could trust Yonah to do the right thing, she was never able to feel comfortable enough to tell her (or anyone, for that matter) about her being a Demon, making her rather lonely as the game progressed.
Though she's aware that Yonah wouldn't take her death well, her desire to help others was stronger, and feels no remorse for her actions.