Mash Kyrielight

• The Squire: Has effectively become this for Verndari, another Shielder.

Cu Chulainn

• Oh, Crap!: Has this when he realizes his teacher Scathach has arrived in Chaldea.

Director Olga-Marie Animusphere

• Spared by the Adaptation: Olga's soul is saved by Ash as opposed to her being dunked into Chaldeas like in the source material.

The Ashen One a.k.a. Ash

• Crazy-Prepared: As a result of his journey prior to the events of the story, Ash possesses a wide variety of artifacts and weapons in his Bottomless Box.
• Odd Friendship: Has developed this with Oda Nobunaga.
• Unskilled, but Strong: As a result of his nature back in the Dark Souls universe allowing him to come back to life after dying, Ash falls under this in the Fate universe and is lampshaded by Scathach during her Trial Quest.

Basile, the Rat King

• Misanthrope Supreme: Downplayed here. He doesn't like humans at all, but he does make some exceptions, such as with Artoria and Vlad.

Black Iron Tarkus

• Achievements in Ignorance: His claim to fame was managing to walk his way through the once-believed impossible Sen's Fortress without realizing the gravity of where he was.
• Kindhearted Simpleton: Tarkus isn't the sharpest sword on the rack, but he has a good heart, as shown in his first interaction with Olga's team in the Scandinavia Singularity.

Dark Sun Gwyndolin

• Groin Attack: Suffers a rather painful one from Artemis during NeroFest.
• This Is Unforgivable!: Gwyndolin makes it clear that he would not forgive Sulyvahn and Faraam for their betrayals. That being said, he's much more conflicted with Faraam in this regard, since the latter is his Cool Big Bro and both of them still care about the other.
• Troll: When he learns that Ash is a follower of Artorias, he makes a point of describing the latter as being constantly drunk and promiscuous just to fuck with him.

Gravelord Nito

• Not so Above It All: Nito and the Milfanito make their first impression with Chaldea by singing Spooky Scary Skeletons during the first Halloween event.

Havel the Rock

• Does Not Like Magic: Just like in canon, he possesses an overwhelming hatred for sorcerers and magic, calling Ritsuka scum first thing after his summoning.
• Oh, Crap!: Has this reaction and tells the party to run after Ash unleashes an Abyss-imbued Noble Phantasm against Hercules.

The Nameless King/War God Faraam

• Heel–Face Turn: He betrays Jeanne d'Arc Alter after she interfered with one battle too many.
• Named by the Adaptation: While his name was wiped from history in Dark Souls, Gwyndolin (his brother) reveals that it is Faraam.
• Worthy Opponent: The Nameless King considers the Servants Chaldea to be this.

Pontiff Sulyvahn

• Reformed, but Not Tamed: He is genuinely on the side of the heroes, but he still keeps to his more vile methods.
• Smug Snake: Sulyvahn is extremely smug, often mocking enemy and ally alike.

Siegward of Catarina

• Supreme Chef: Despite being undead and lacking a sense of taste, Siegward is extremely good at cooking.

Verndari, the Looking Glass Knight

• Samus Is a Girl: When Verndari was first introduced, the readers were under the impression that they were a man. In the By The Bonfire segments, this turned out to be the opposite.

Isshin Ashina