Update (2nd): Windsweep's description has been clarified.

Update (1st): the stats should now be accurate.

New units are in! (Stats are approximate, we'll refine them as more data becomes available.)

Lukas

45 hp, 35 atk, 22 spd, 38 def, 17 res. These stats are pretty similar to Ephraim, but with a greater emphasis on def (at the cost of a few spd points). This 40 value, if real, is monstrously high (highest defense right now, and this includes armors). He basically feels and plays like an infantry unit with armor stats. Lacking access to Wary Fighter will hurt, though.

Killer Lance, Sacred Cowl, Obstruct. Useful without being stellar.

Fortress defense (A slot, -3/+5 atk/def). Great defensive skill, combines well with Bonfire/Ignis (especially Ignis, which gains 4 in firepower just from this skill). Probable staple of tank units.

Nice base skills set. You can get him to proficiency with relatively little investment.

Clair

37 hp, 26 atk, 36 spd, 24 def, 33 res. Best described as flying Setsuna. She'll be a perfect fit for quad-strike builds. One more great unit for Flier Emblem.

Silver Lance, Harsh Command, Spur Speed. Nothing supernotable here. Most of her base kit is irrelevant to her actual potential.

Hit and Run (B slot, unit retreats after attacking - similar to Drag Back but without dragging the foe.). Very similar to Drag Back, but with less danger to the unit. Allows for a much more careful attack style.

Her base skills don't work well with the story her stats tell, but she's a great inheritance unit.

She's especially relevant to flier teams.

Faye

45 hp, 30 atk, 25 spd, 26 def, 31 res Nile's res, Gordin's atk and spd. Her stats make her a slow magus killer. Ultimately, just like most archers, her stats are usable, not stellar.

Noontime, Wings of Mercy, Bow Experience. Her base kit makes her an atk support. She can easily provide a third atk after one of your wounded frontliner melee units' attacks. Noontime is always useful to stay alive and provide sustain.

Firesweep bow+ (Weapon slot, 11 atk, prevents counterattacks involving this unit (both on attack and defense).). This bow is game-changing, and cements her role as a magus killer (mages can't counterattack against this bow). Unfortunately, it would work better on Niles (whose speed would allow more double attacks, which ultimately helps more than atk against most mages). Combines well with Breaker skills. It should bypass Vantage, but this needs testing. Update: it does.

The unit itself isn't particularly brilliant (although her base kit makes her useful for PvE and some situations in Arena).

On the other hand, that bow is game changing so there's that.

Alm

45 hp, 33 atk, 30 spd, 28 def, 22 res A slower Lucina. Not exactly thrilling for a red lord (Lucina works because she's fast). Doesn't keep him from being useful, but he's basically average leaning on the offense rather than a specialist and that'll limit him.

Falchion, Draconic Aura, Atk+. Straightforward kit, everything in there is useful.

Windsweep (B slot, Unit's follow-ups are prevented when attacking. Counterattacks from physical foe are prevented if the unit is quicker.). A game changing skill. Bypasses Vantage which is helpful in offense (but it's not quite broken - in defense, it's useless and it will also slow Special charging). Needs testing to see how it interacts with Breaker skills. Update: it only actually prevents follow-ups from the user, not the foe. As a result it's only useful on fast units, and does not interact with Breaker skills (either you're cancelling counterattacks or you aren't cancelling anything).

Just like Faye, Alm brings an absolutely fantastic skill to the skills pool, but the unit itself is average.

The era of Vantage Hector may be coming to an end.

General comments

Lukas and Clair have great potential. Alm and Faye not so much but their skills are game-changing.

-- by takaminacchan