all-in-one!
lily used gillyweed, like james did! she wore a watch and waterproofed it before she went under so that she could help everyone with their hostages before she brought abby back up. she kept checking on abby and checking her watch and once she was confident all of her teammates were able to get their hostages back up, she rescued abby and totally snuggled her and harry with blankets and towels because ghfdkjghdk <--- yeah, that.
jane, on the other hand, was not so much a team player because WTF her whole family was pm down there aside from moony. she used gillyweed tooo thanks to moony's suggestion. so she tried to save sirilla, hannah AND luke. once regina showed up, she let regina do her thing for sirilla but fought severin tooth and nail because gfhdjkghdk BITCH BACK UP, lmao. anyway, she eventually had no choice but to let severin rescue luke and rescued hannah herself. she was NOT happy afterward and probably didn't let luke or hannah go FOREVER.
teddy meta'd! he jumped into the lake and then changed into a merman since metas can change into basically any living creature :D and then he rescued his gram and had all the feels forever. if he was allowed, he would have left andromeda to go back into the lake to make sure his teammates were faring alright.