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So this is different than usual. In the interest of not dropping ~36 levels on you before we even get to Floor 4, I'm going to be skipping to whenever the unit happened to get their latest level and including all of their gains (the caption will include whatever they got in the level pictured). I had to make two trips to get Ewan all trained up, so I'll start with the first trip:
Naturally, since I was trying to level up a L1 trainee, the game decided to throw three Entombed at me. Ewan can't hurt these guys at all, so I fed them to Marisa and Tana instead.
(2 levels, +2 HP, +2 Str, +1 Skill, +1 Luck, +1 Def)
I could hold out for those last two levels, but there's really no reason to now that Tana has maxed strength, so let's deal with that now.
Falcoknights are the standard Peg Knight promotion, gaining swords in addition to lances. While it's not the biggest selling point in the world, if you want to do the triangle attack, you have to promote at least one of Tana or Vanessa to Falcoknight. It's not like it's a bad class by any stretch of the imagination, but Wyvern Knight is much better.
The alternate peg promotion is Wyvern Knight, which is basically better in every way. You don't get swords, but Wyvern Knights have better caps, Pierce (reduces enemy defense to 0 for one attack), and the grandest prize of all for a peg knight.
+4 Con. Even if Wyvern Knights lost every other advantage they had over Falcoknights, the +4 Con would still be enough to justify promoting into.
Now, for our second trip. Ewan was given a single use of an Energy Ring, Dragonshield, and Angelic Robe (Energy Ring before promotion, Robe/Shield after) to give me a little breathing room on both offense and defense, so bear that in mind when you see his stats. First, he closed out his time as a pupil with...
That's...not terrible, at least. Ignoring the Energy Ring and hack boosts, he's at +3 Mag, +1 Skill, -1 Speed, and even in everything else. Let's see how everyone else did.
Floor 1
(2 levels, +1 HP, +1 Str, +1 Spd, +1 Luck, +1 Res)
And with Ewan at L10, it's time to prepare him for his ultimate destiny as a summo-
Oh. Oh. I see how this is going to be. Well there's no way in hell I'm making him a monk so...
Well, I guess I know who my mage knight is going to be now.
Floor 2
(3 levels, +3 HP, +2 Str, +2 Spd, +1 Def, +1 Res)
(3 levels, +2 HP, +1 Mag, +1 Skl, +1 Spd, +2 Luck, +1 Def, +1 Res)
(2 levels, +2 Mag, +1 Spd, +1 Luck, +2 Res)
Floor 3
(5 levels, +5 HP, +1 Str, +2 Skl, +2 Luck, +1 Def, +1 Res)
(6 levels, +3 HP, +4 Mag, +2 Skl, +1 Spd, +5 Luck, +2 Def, +1 Res)
(3 levels, +2 HP, +1 Skl, +1 Luck, +1 Res)
Tower 4: The Secret of the Pyramid
First things first, Forde is ready for a promotion.
We all know how Paladins work, since Seth is with us from the beginning of the game. They stick with Swords and Lances, get 8 move, and relatively balanced caps. There's nothing amazing about them, but they don't have any real weaknesses either.
Great Knights are essentially knights on horseback. They've taken the FE7 paladin role of having all three weapons, and they skew much harder toward a higher Str/Def cap at the expense of skill and movement (cavaliers actually lose a point if they promote to one). They also are weak to both anti-armor (hammer/armorslayer/heavy spear) and anti-cavalry (halberd/zanbato/horseslayer) weapons, but they generally don't come up enough to really be a problem.
I don't really have an opinion either way on these guys, but having another axe user is nice since the author keeps taking away all my other axe users.
Tower 4 is a short, easy one. The biggest issue is that we have three units stuck up top, and the AI will be making at least a token attempt at killing them. I'll spare you the monster rundown since there's nothing new aside from the boss.
Gwyllgi are your promoted Mauthe Doogs, and the closest analogue to a monster Swordmaster. Fortunately they do not have any sort of bullshit instant-kill or a crit boost, but he can double everything in my army, with the exception of Tana and Gerik.
Seeing as I didn't stuff the north group with tanks and promoted units, we have to play defensively. That entombed will be coming down to attack, as well as a pair of mauthe doogs from near the boss and a Short Spear skeleton from the right.
In the south, Ewan is busy embarassing skeletons as he, Priscilla, and Erk head up the left side. Forde and Neimi take the right.
Spectacular. I don't know why I haven't just promoted you yet.
While Ewan is doing pretty spectacular on the whole, he is coming up oddly shy in speed. I'll have to toss him a use of Amelia's speedwing.
The north situation looks worse than it is. Unless Guy pulls a crit out of his ass, he can't be killed by the skeleton and one mauthe doog, so if Natasha is pulling healing duty, he'll be fine. Marisa is also very safe, because the entombed moves before the skeleton archer, and once Natasha moves up next to Guy, neither of them will have a target.
Naturally, the first thing I do is disrupt that safety by killing the archer and opening Marisa up to attack from the entombed. 
Neimi is acting as bait for the Tarvos. He's using a hammer, so Forde has to hang back on this one.
Another turn, Natasha fixes up Guy, gets a great level for it.
Fortunately, the numbers work out just right so that Marisa can kill the entombed on her second double-counter. The level isn't so nice.
Guy gets a fantastic level by offing the Short Spear skeleton. It's turn 5 or so, and we're actually almost done already.
That said, the boss is a piece of work and I don't want to deal with him until I've killed off all of his friends, so we'll advance very slowly into the final corridor.
Marisa picks up another spectacular level in dealing with a mauthe doog, and Ewan takes care of the other one. Time for the boss.
Forde hops on the pillar to keep bullshit to a minimum. The boss is capable of doubling everyone that I'm fielding right now, so I need the toughest unit to take the opening blow.
Fortunately, the boss misses twice. For as fast as he is, he can't take much punishment, so Forde's opening blow is enough to easily put him away next turn.
And Neimi is one point short of doing the deed. Oh well, next floor.
Forde finishes the job and we are done. Okay, technically we're not, but Tower 5 is...special. You'll see next time.
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...SACRED STOOOONNNNNEEESSS! 