Itsuki is great for a free red sword unit. Having a great mixed defense, salvagable Spd, good Atk. And his sword being anti-dragon in addition to a mixed phase effect is awesome.
I bet he's going to be a grails project for quite a few players. Could also work good with DC, given his solid mixed defense.
Kiria and Tharja, more like Kiria and Tankja. Absolutely wants a Spd bane and an Atk boon, Def boon could work too. That Atk, woah ... combined with her double Res debuff (weapon passive and Lull skill) she's going to hurt, even for a Res tank.
I think the units all have good stats, but nothing in the stupid high territory. Guess that somehow fits the Idol theme, they need some preparation and support and aren't murdering the whole AA run alone like some armor dragons or FallenCorrin can.
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Seals for the upcoming TT: Chill Res, Mirror Stance and Defiant Def (...)
Bonus units: The new TMS chars, including Itsuki, and (this will please MANY i think) vanilla Chrom, vanilla Caeda and Virion!
Chill Res completes the skill set in seals, great. Mirror Stance will get so much use on my vanilla Julia with her anti-dragon Close Counter passive. Defiant Def ... no TT without a joke seal, am i right?