(Re)Introducing the
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. She may be only Gold rarity, and not as tanky as Katie, but she has better attack and, more importantly for Reinforcement soldier, can be min-costed. Awakening gives her ability to improve party's attack power a little (2%) by simply being in team. And Skill Awakening makes her so much worse in her primary role of a ramp that it might as well not exist
Likewise, (Re)Introducing the
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. He (yes, he) might be the first Black rarity event character, but not many would ever put him on the team, as he is capped at level 30. But that is because he was never intended to fight on his own! Right, his only purpose in life is to be reborn into everybody's favorite Black Dragon Princess, Anya! Do note however that you will need to
level up Dorania to level 30 and
use
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and
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, as well as Spirit of Time for that. Worry not,
both bronze and silver unit needed
will be available at the second half, the revival of "Return of the Dragon Princess",
from 20th to 27th.
You
do not need more then one copy of Dorania to make Anya, and
Anya will already be at her minimal possible cost from the moment you unseal her.
To make that possible, (Re)Introducing the
Spirit of Time Fleur. This fairy can reduce the cost of any unit she is fed to with 100% guarantee! Unfortunately,
only one can be obtained from the TP per revival cycle, and she is
necessary component of Class Evolution (or rather, Unsealing) of Dorania into Anya, so if you are new, cost reductions will have to wait.
And even if she is technically from the another event, (Re)Introducing the
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. First (and currently only) of her special class (meaning, no class evolution necessary), Echidna is a healer-mage hybrid who is normally seen healing injured allies, but piss her off and she pops her skill to unleash her draconic heritage and become a fireball-breathing killing machine

Awakening makes her strengthen all draconic units' health and defense by merely being in the team. And yes, that includes Dragon Riders like Lucille) Skill Awakening whenever it will come to us, turns her into all-healer, restoring health of every unit in range and even buffing defense for draconic units in range as a bonus!
Last but not least, (Re)Introducing the star of this show, the one, the only, Black
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! A Princess who can block two and (after Awakening) attack both as well. Her Skill, trusty "Holy Blade Ascalon" cuts all (but magical) incoming damage in half! Awakening ability grants her 20% MR. Skill Awakening, whenever it will come to us, turns her skill from defensive into offensive, granting her ability to attack all enemies in range with double the power, but whenever it is better than her regular skill, decision is hard...