This series is actually willing to kill characters occasionally, so no telling what will happen to who. But it IS always weird when everyone in the series shrugs off whatever gets thrown at them for dozens of adventures, and then suddenly one character has realistic consequences to fights.
Like in Avatar where they randomly killed Jett from a fairly minor looking rock attack. But the blind girl running from an exploding blimp in the air at the end of the series is fine.
Or in the third season of Young Justice they introduced a character that basically has a resurrection power. And because she was semi-immortal, suddenly it was okay to snap her neck, cut her throat, blow giant holes in her, and cause serious bloody death wounds… and they did so over and over. And its one thing to show that happening to an inexperienced character as a showcase... that it kept happening to her over and over, while everyone else kept getting away from confrontations without a scratch just kind of shone a light on the fact everyone is immortal. Rather than raise the stakes when she got hurt, its made the stakes of everything else seem more ridiculous. It was still a well written well done season, but that one element was consistently jarring.
It's fine to hurt the characters and have consequences... but its weird for it to be atonal from the rest of the series.