In earlier titles protagonists had two different "Attack" stats: Slash and Thrust. This is referenced with the Arte Proficiency system where more physically-oriented characters have arte proficiencies in opposite or complimentary types, e.g.: Alphen can earn proficiency in Sword Strike and Aerial Strike, while Law in Fist Strike and Leg Strike.
The artes obtained from DLC costumes are either directly taken from or elemental variations of recurring artes in the franchise.
The relation between Dahna and Rena is similar to that of Inferia and Celestia, where they both exist in rather close proximity to each other while knowing about the other world, one world being a much more technologically advanced (Celestia, Rena), while the other being behind (Inferia, Dahna).
Enslaved Dahnans have spirit cores embedded in their hands, similarly to how Desians embed Exspheres into slaves. In both cases it is related to gathering power through unethical means.
Both Magnius and Balseph are axe-wielding leaders with affinity for the Fire element.
Both Kvar and Ganabelt Valkyris are leaders associated with Lightning (in Tales of Arise Light and Lightning are both considered Light-elemental) element.
Both Pronyma and Vholran Igniseri are leaders associated with Water and Ice (in Tales of Arise Ice-themed spells are Water-elemental) elements.
Ironically both Pronyma and Almeidrea share the distinction of being the only female in the ground who are killed by the game's antagonist (Pronyma by Yggdrasill and Almeidrea by Vholran).
The leaders/Lords are in the same elemental order in both games.
One of the areas in The Otherworld is based on Torent Forest.
At the start of her journey with the others, Rinwell hates and is very hostile towards Renans, similarly how it was in the case of Annie Barrs and her view of Gajuma. Both characters start to accept the other side as they experience more things.
Dohalim is the Lord of Elde Menancia and the owner of the Earth Master Core and Brute Lualdi is the leader of Vanguard who at one point in the story possesses Solum's Core who is the Earth Centurion. Both of these high-ranking people go at one point berserk due to the power of an object holding Earth-elemental energy.
As a part of the game's DLC, Rinwell can acquire an outfit based on Rita Mordio's appearance, while Kisara one based on Flynn Scifo's appearance.
Shionne Imeris shares many similarities with Estellise Sidos Heurassein, including being a member of high society, a user of potent healing magic artes, and harboring a power that can possibly bring destruction of the world.
Rinwell is a book-wielding mage like Rita. Additionally both shares a battle quote when shortening their spell-casting time, i.e.: "Blah-blah-blah!"
Similarly to Asbel Lhant, Law has also run away from home at a young age because of his father. During the main story, both sons' fathers die and both young men are left with regret with the actions of their younger selves.
While astral energy is the lifeforce of all matter, similarly to the recurring concept of mana, it is most similar to eleth.
The Great Astral Spirit is similar to Fodra Queen in terms of being an entity formed from a massive concentration of astral energy. Both of them also see humans as enemies to their own well-being.
As a part of the game's DLC, Law can acquire an outfit based on Jude Mathis's appearance.
If large amounts of astral energy of a single element are accumulated in a spirit vessel it may result in an elemental spirit's manifestation, like when in Bermia Gorge the large amount of mana drained from experimented people resulted in formation of a spirit-like Wind-elemental entity.
Dohalim's fighting style is based on Leia Rolando's as they both wield rods that can extend when performing a perfect evasion, can perform a variety of artes in midair, and have access to healing artes.
Alphen and Rinwell's Boost Strike Supreme Altar, known in Japan as "S. Elements Alter", references Milla Maxwell's mystic arte, Elemental Mastery, which is known in Japan as "Supreme Elements". Both artes involve using four elements to attack a foe.
Astral energy contained in Shionne's Fire master core manifests as the Blazing Sword that can only be wielded by Alphen and the weapon proves to be powerful enough to defeat the Five Lords who terrorize the world of Dahna. This is a similar situation to Lailah and Sorey where the seraph provides the shepherd with a sword of fire to aid him in his duty of purifying malevolence.
One of the areas in The Otherworld is based on Rayfalke Spiritcrest.
As a part of the game's DLC, Shionne can acquire an outfit based on Velvet Crowe's appearance.
Zephyr bears a similar role to Seres as a character who guides the protagonist, but their life is ultimately cut short by unforeseen circumstances (Seres is devoured by Velvet after suffering a fatal wound during their escape from Titania while Zephyr is poisoned by Ganabelt).
In battle Alphen suffers damage to his HP every time he uses the Blazing Sword. This is similar to Velvet's Therion state which also drains her HP for exchange for more power.
Rinwell shares one of her battle quotes with Magilou, i.e.: "Magikazam!"
One of the areas in The Otherworld is based on Mount Killaraus.
