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Learns Black Magic Crit +10 upon completing budding talent.

This analysis was written by FlashingFire.

Felix is a versatile, easy-to-use offensive powerhouse who is well equipped to take advantage of any of Three Houses' standout physical combat classes.

His stat line heavily emphasizes strength and speed, two of the most important aspects of any frontline fighter. In the Blue Lions route, base 10 and 9 in each respective stat are very appealing, and 55% growth rates for the both of them mean Felix becomes capable of ORKOing enemies much faster than most of your squad. Felix's personal ability, Lone Wolf, can help with this in the early game (of non-NG+) when you only have a handful of battalions to distribute. Felix won't need one when 5 extra damage per hit outpaces any battalion boost for several chapters. The ability synergizes especially well with gauntlets. You'll want to give Felix a battalion eventually, as more useful ones become available and taking down monster barriers becomes more important. Just don't rely on him to hit gambits much since his charm stat is nothing special.

Felix appreciates both Strength +2 and Speed +2, so whether you master Fighter or Myrmidon can come down to preference based on what your goals are for him. Unsurprisingly, Death Blow and Hit +20 should be the intermediate class mastery goals. Their consistency and reliability are just too good to pass up, and their respective classes even synergize well with the weapon boons Felix has and the class paths you'll likely want him to take. Death Blow is always something worth obtaining as soon as possible, but it may be worth switching to Archer for maps like Chapter 5 and Chapter 6, where retaliating against enemy archers can ease your headache somewhat. Finally, even if you prioritize Brigand over Archer, Felix gets access to Curved Shot very quickly, and it's well worth it to give him that extra range and/or accuracy while most of your army can only move four or five spaces at a time.

From there, the options open up. Perhaps the most straightforward path is that of the Grappler and/or War Master. The objective here is rather self-explanatory: maximize Felix's damage output and let him beat down foes before they even have a chance to retaliate. These classes allow him to apply Fistfaire, Death Blow, battalion bonuses, and any Linked Attack boosts he might have (with Ingrid and/or Sylvain) two, three, or even four times. While mastering these classes is nice, especially if the focus is purely on being a Grappler, Felix is not as reliant on Fierce Iron Fist or Quick Riposte as units like Raphael or Dedue would be, thanks to his more generous stat spread. He has the flexibility to emphasize his Nimble Combo combat art or evade several attacks while in terrain or stack crit boosts as a War Master. It's worth noting that Felix with gauntlets can absolutely demolish monster HP bars between his raw damage output and high crit chances, even after they start climbing into the 100+ range. As a final note, gauntlets also give Felix's Major Crest of Fraldarius the most chances to proc, though this shouldn't be relied on even with a decent 40% activation rate.

Another very efficient path is the Sniper, a.k.a. Hunter's Volley: The Class. This route trades the sky-high damage potential of gauntlets for the range and relative safety of bows. Two hits to apply Death Blow and other boosts is still no joke with Felix's strength stat, and while Felix's dexterity isn't the most incredible thing in the world, he can stack crit boosts about as well as most Snipers. Again, he won't be as reliant on class mastery as other units might, but with Hunter's Volley there's so rarely a reason not to use it once it becomes available.

As with just about any unit in Three Houses, Wyvern Lord is worth your consideration. While this may cost Felix the ability to kill as many opponents before they can retaliate, thus putting him in harms' way more often, it also maximizes his movement and gives him Canto, something he would otherwise require the DLC Fetters of Dromi to obtain (or a horse, but there's no real reason to put Felix on a horse instead of a wyvern). This means he becomes more capable of getting back out of harm's way after deleting enemies with his still-outstanding stats, not to mention how he gets to ignore terrain. This route will usually limit Felix's choice of battalions pretty sharply, however, thanks to his Authority bane.

While Felix's affinity for swords is one of his more prominent character traits, sword-based classes tend to lack desirable attributes that are found in other aforementioned classes. Grappler and War Master have a higher damage potential, can always strike at least twice in a row, and have more worthwhile class mastery abilities. Sniper is more flexible with its proficiency at indirect combat and high accuracy. Wyvern Lord grants Felix flight, high movement, and Canto. He can still perform well as a Swordmaster or Assassin or even a Hero, just know that choosing those classes leaves a lot on the table.

Felix's high speed and proficiencies in Swords and Brawling also mean he is capable of focusing on evasion, either via becoming a Dancer for Sword Avoid +20 or by mastering the DLC War Monk class for Brawl Avoid +20. Both options have their caveats. The sword route is less resource intensive but can split Felix's ambitions between fighting and dancing when other dancer choices might be more efficient. The brawling route can be rather heavy on the required training thanks to its Faith magic requirement. If you want Death Blow, Hit +20, and Brawl Avoid +20, that's going to require training Felix in Axes, Bows, Brawling, and Faith to various degrees. Either way, Felix will be essentially limited to equipping Jeralt's Mercenaries if he wants more than 10 avoid from a battalion, barring a huge investment into Authority. Overall there are better candidates for dodge tanks, but the option is worth noting.

Speaking of Authority, Felix's bane in the skill can be annoying, but it's not severely detrimental. For starters, Jeralt's Mercenaries make for a fine battalion that's worth equipping for the entire game. They allow you to essentially ignore the bane entirely if you so desire. Additionally, Felix greatly appreciates the part 2 lord battalions, which only require C Authority and grant some of the best combat boosts in the game. The King of Lions Corps is especially deadly on a brawling Felix, granting 10 (10!) extra damage per punch. Giving Felix the Ashes and Dust gambit is admittedly suboptimal on the Golden Deer route, but between Hit +20 and Gambit Boosts it's still workable.

With standout early combat, a helpful set of skill proficiencies, and the ability to become a point-and-click delete button during the player phase, Felix is one of the most straightforward and satisfying characters to use in Three Houses.

Felix can build support with the following characters.

Felix will automatically be recruited if the player selects to teach the Blue Lions house.

Felix can be recruited once Byleth has achieved a stat of Spd 15 and Skill Rank B+ in Sword. These requirements can be lowered if Byleth builds support with Felix, as shown in the below table.