Hints for the Legendary Hero!

In the FEH Subreddit, they've once more turned to the unused skill templates that have been known to be pretty accurate at guessing Legendary hero Skills and this time, to me, theyre telling.

AID_戦闘強化_敵TP変動値変化 (lit. "combat boost - foe's cooldown charge change")
Grants stat boosts during combat, and also reduces the foe's cooldown charge by 1, always or per unit's / foe's attack. The related SAID, SAID_戦闘強化_TP変動値変化, is used by Breath passives, so presumably this tag would be used in similar skills; if this is used in a passive rather than an exclusive weapon, it means we will the Guard effect on slot A passives as well.

SAID_追撃効果無効 (lit. "nullify follow-up effects")
Neutralizes the foe's skills that affect follow-ups. This includes, but is not limited to: Brash Assault, Quick Riposte, all Breaker passives, all Fighter skills (except Special Fighter), Great Flame, Thunder Armads, the exclusive weapons of all variations of Ephraim. It does not affect skills that prevent counterattacks (Firesweep weapons, Dazzling Staff), nor the unit's own skills, unlike Hardy Bearing. It also does not affect the part of the skills that do other things as long as the skill conditions are met; for example, when initiating combat against a foe with Vengeful Fighter, the foe still gets cooldown charge +1 per foe's attack, but that foe will no longer always counterattack twice.

SAID_守備魔防最低値参照_味方隣接 (lit. "use lower of Def / Res - ally adjacent")
If the unit is within a number of spaces of an ally, that unit will do adaptive damage to foes. This can already be done using existing tags, by combining SAID_守備魔防最低値参照, used by Felicia's Plate, and SLID_周囲味方数, used by Laws of Sacae and Royal Sword, although both have skill range equal to 2; the only reasonable guess is that whichever new skill using this tag has used up its two SkillLimit IDs, so the ally condition has to be merged into the SkillAbility ID.

SAID_周囲能力奪取 (lit. "steal surrounding stats")
If any foe is within a number of spaces of the unit, inflicts a stat debuff on all such foes and grants an opposite buff on the unit, like an out-of-combat version of Rogue Dagger, which uses SAID_能力奪取 instead. For some reason I could not get nearby allies to receive buffs; on the map with animations enabled they appear to receive +0 buffs. (The range for allies and the range for foes have to be specified using the same parameter.)

In short. The first skill is a Guard Like A Skill. It could be a unique skill, and likely will since a Guard A Skill sounds like overkill. This is not telling since any unit can have a guard skill for their A as a unique.

A follow up nullifier. Wary Fighter that doesn't affect the user from the looks of it. This is also not very telling, since this could be another brand of fighter skill for faster armors, or an anti armor skill for this LH. Yet to see.

A adaptive damage module when beside their allies.

And a Nosferatur/Stat absorb. It removes the stats from an enemy within a certain number of spaces before using them for itself.

To me, this one actually feels easy to discern, just like we knew from the way the skills were named that it would be a Marth skill but didn't know when he'd show up.

With this, go ahead and try to theorycraft your own Hero (that makes sense XD) to see who makes the most sense. Do keep in mind, only one of Marth's Skills (the Fire Emblem special) was the one used out of a bunch of skills for his LH. So it could very well be only one of these skills that will be used while the rest are repeats. So go ahead and lemme know what you think.

But...here's my guess.

I only know one hero that uses adaptive damage, and no less when beside friends, cause the power of friendship is the strongest. This to me screams Robin, as it relies on the same Awakening style of friendship is power, and would make sense with his Levin Sword.

PS I know Robin is an unpopular opinion, but Grima and Robin are separate entities, and as far as I know, Robin is the only hero in the series with a sword that has adaptive damage as a potential skillset due to the weapons main idea of hitting or not hitting as a magic focus or a sword.