I don’t know how to post images (mobile makes this hard) but there’s a bug involving Steady Breath, so I’ll just copy-paste the log. The Elincia has Desperation 3 (while not being in Desperation range) and the Sheena has Slaying Axe+ and Ignis as well as Steady Breath. Ignis should be activating.
Sheena, Princess of Gra gains 4 defense from getting attacked [Steady Breath].
Elincia, Lost Princess attacks. Triangle advantage boosts attack by 20%. 15 damage dealt. Sheena, Princess of Gra gained an additional special cooldown charge [Steady Breath]!
Elincia, Lost Princess attacks again immediately [Amiti]. Triangle advantage boosts attack by 20%. 15 damage dealt. Sheena, Princess of Gra gains an additional special cooldown charge [Steady Breath]!
Sheena, Princess of Gra counterattacks. Triangle disadvantage reduces attack by 20%. 16 damage dealt. Sheena, Princess of Gra gains an additional special cooldown charge [Steady Breath]!