Here's what I think about T Beira:
Main attack:Freeze Breath
Ice Consumer:Instead of pushing ice sculptures,T Beira can devour them.
Ice heals you:Devouring ice sculptures has a chance to heal half a heart
Weak against fire:She takes double damage from fireplaces & other fire-related objects
Ice-like fragility:When she goes to the next floor,any empty red heart containers you have will become Broken Hearts.

i think her sprite would be her normal version's fully frozen sprite and she would start with Uranus and have her freeze attack have no cooldown but she would start have the effect of heartbreak but for frozen hearts and 6 frozen hearts witch function as broken hearts that can only be removed by getting birthright or stealing warmth from enemies with her pocket active but increase the chance for her attacks to freeze enemies

Is there a tained Beira yet? I just get Cailleach and it launches a random char. did a Home run with the red key and it didn't unloack anything :)