Is that Silver Angel passive useful ? it says merging 5 of this thing so it must be good right ?^
And if I do want leila do I Need to demand surrender if I did win the First Battle ?
Passives are, in a way, stupidly broken, despite many of them being weak. Silver Angel passive is more or less weak but it's variant, Golden Angel, is broken. For every unit merged with the unit with Golden angel, Rance gain emotion bonus 5 times(the my slave event one). Enough stacking and Rance can reach stupidly high stats. I mean, I have a save file at turn 78 and Rance at Lv1300. And I have only merged Rance with 4 fiend units so you see the thing here. There's even a passive that doubles your damage and another you see when facing Housenurse that straight up reduces damage received by 432 in both field battles and dungeon battles.
About Leila, Idk, I managed to capture Rick on my first run despite choosing not to cooperate with Lia, when he appeared during Helman war arc. So maybe you can capture them if you're lucky enough?