Beauty, Brains, and Brawn: The main trio fit the dynamic to an extent as they also overlap with one another's roles:
Aria - Beauty (+ Brains). She is an absolute sweetheart, supportive of her boyfriend's endeavors, and the only one of the trio incapable of combat. However, Aria would make up in wits with her trading know-how, connections negotiation skills as the daughter of a renowned, influential merchant and overall being a social butterfly who can charm her way into securing good relations with other countries as well as Magnus' heart.
Magnus - Brains (+ Brawn). His strategy book, Crazy-Prepared, no slouch in the smarts department
Chocolate - Brawn (+ Beauty). After transferring into the body of a Massacre Maid,...hand-to-hand combat, easy on the eyes for the same reason, Team Pet
Blow You Away: The Sea Breeze Bell Magnus acquired in the ruins of Alabarna allows ships to pick up speed, as it "will ring a sound only a seas breeze spirit can hear when waved", and utilise it to pick up the pace when sailing the seas of [...]
Combat, Diplomacy, Stealth: The main trio fit these categories to a T and often work together to support and make up for one another's shortcomings.
Chocolate is Combat who was transferred to the body of a Massacre Maid, an absolute martial arts powerhouse, durable
Aria is Diplomacy as being the daughter of an influential merchant... very skillful at negotiating, exudes charisma
Magnus is Stealth, people constantly underestimate him, way more powerful than others think, prepares and plans extensively in advance thanks to the Strategy Guide
Dirty Coward: ...vastly underpowered and unable to fight Evil Cursed General Derbenvot, Eugene grabs Hilde and books it, leaving the rest of his party members to die if not for Magnus' intervention
Dracolich: The Grand Megoras Mines has a three-headed skeleton dragon...
Even Evil Has Loved Ones: Eugene, for all his arrogance, cowardice and unbridled wrath, truly loves Hilde
Flesh Golem: The Massacre Maids...more attractive-looking than the standard fare, Ninja Maid
Golem: commissioned legendary blacksmith [...] for Gladius I and II
Playing with Fire: One of Magnus' specialties, <Fire> series...Fireballs, sun, eclipses over five ship-sized ones and extinguishes them in a pathetic fizzle