Noel is a gold bishop with extra gold gained at the end of each battle as her AW passive(?) and Kagura is a plat shaman I believe.

Similar to how Fran is the best free vampire hunter should we ever get her, Chloe is one of the best melee angels. Miruno's your other free angel and she is the best of all of them with her high attack and range plus poison immunity AW passive to all angels.

Eliza is a plat witch which would be useful for free players who missed out on Belinda as they only have Cloris and Calliope to depend on if they don't roll gacha.