Here u go i copied and pasted from one of her comments
guys! read her ability!
"At the start of each round after the first one, the player with Bridget in their team receives one extra Life point."
AT THE START OF EACH ROUND!
stop asking why it doesnt work after the last round.
Bridget abilities will started to activate at round 2
from my experience,if you didnt ko opp that using bridget,your opp will gain 1 life at the end of the battle
example : my lp 1
opp life point 4 (opp using bridget)
at 4th round i succesed hit opp with eadh (3 damage) then at the end of battle the result will be
me : 1
opp (using bridget) : 4-3+1 = 2
at least that happen to me when i met opp that using bridget last time
same case with heal that activated even the battle ended (if still under heal max yet,and doesnt ko'ed by opp)