Trails of Tetraphobia: Moonlight Horse

Trails of Tetraphobia: Moonlight Horse is a spin-off of the Trails series of JRPGs.
It follows Ellroy Harwood, future Fourth Anguis of Ouroboros, as he ascends in the criminal underworld, has the battle against the Ouroboros Society, and finally usurps Yin (Ljubomir Mao) as the Fourth Anguis of Ouroboros. 
Unlike most Trails games, this game is much more similar to Undertale, being a more experimental RPG which allows you to kill or spare enemies as part of the plot. It takes the morality system of Trails through Daybreak even further, by even having multiple endings called Low Chaos, Neutral Chaos and High Chaos.
Like Persona, and unlike Trails, this game has a day-to-day calendar system with life simulation elements (though unlike Persona, you don't play an ordinary high school student, but some sort of professor in a military school... which is actually an assassin order!), and has Social Links. Hence it's been described as "Persona meets Yakuza meets Undertale".
== Characters ==
Ellroy Harwood: The protagonist, he's a mostly non-speaking protagonist whose only voiced lines are dialogue options chosen by the player (since he grew up as an assassin in the order of the Moonlight Horse, it's implied he speak little due to a trauma). Harwood is the captain of the Thorn Section, one of the four section of the Order of the Moonlight Horse (as such, like in Fire Emblem Three Houses, your protagonist has a teaching role rather than a student role). Harwood is actually Eigash Lrye Oibar, one of the Five Demon Lords. Eigash Lrye Oibar manifests as a split personality inside Harwood and allows him to control the "Kegare", a poison which allows him to instantly kill enemies and also to kill Devils from Gehenna, and is implied at the end that they finally become one (so that the Harwood that appears in the main game is a Harwood that has fully merged with his Demon Lord self. In the end, Harwood becomes one with his demon side, which makes four of his disciples betray him and join Ouroboros (unless you're in the non-canon Low Chaos ending, in that ending, Harwood breaks off from his demon side and leaves the Order of the Moonlight Horse, implying he becomes a Spriggan alongside Lisa, Giacomo, Lucrezia and Salvatore). 
Kreuger Lisa: Lisa Krueger is one of Harwood's disciples. She's destined to be taken by Ouroboros and become Enforcer IX, her name being changed to Sharon many years after the events of the plot. 
Conte Giacomo: Giacomo Conte is one of the disciples that make up Harwood's team. He does not join Ouroboros, instead he leaves the order of the Moonlight Horse and runs off, hiding in Calvard until he's killed at the time of Kuro no Kiseki. 
Wakabayashi Lucrezia: Wakabayashi Lucrezia is one of Harwood's disciples. She'll later change her name to "Lucrezia Isselee" when she betrays the Harwood and joins Ouroboros at the end, becoming Enforcer III (taking the name from a Calvardian of Eastern origin that she killed, Issei Lee).
Di Gregorio Salvatore: Di Gregorio Salvatore is one of Harwood's disciples. When Di Gregorio betrays Harwood at the end, he becomes Enforcer IV, whose title is "Shogun". 
Melchior Altrich 
The Obake: A ghost-like being called an Obake (from Eastern Zemurian folklore) which acts as a guide for Harwood and mostly tends to talk for him, similar to Navi for Link. It's actually his demon side, Eigash Lrye Oibar, manifested, trying to guide him, and it allows him and the rest of the group to use ARCUS-like combat links called Devil Chains.
Mao Lyubomir, the Silver Moon: Also known as "Yin", Ljubomir Mao is a skilled assassin from the Eastern Quarter, Langport, Calvard. Ljubomir is the fourth Anguis, who specializes in underworld connections, and has ties to the criminal organization Heiyue. He has a daughter, Rixia Mao. 
Leonhardt Loewe, the Bladelord: Enforcer II of Ouroboros, originally from the city of Hamel, in Erebonia. He's a skilled swordsman and wields Kernviter, a sword forged through Divergent Laws which can alter space itself.
== Trivia ==
* Leonhardt Loewe is confirmed only in this game to have Leonhardt as first name and Loewe as last.
* This game reveals three Enforcers and a former Anguis.
* Giacomo Conte, Lisa Kreuger, Salvatore Di Gregorio and Lucrezia Wakabayashi are all children taken from Isuka, in Eastern Zemuria. Except for Salvatore, all three are canon characters in the Trails series (but Sharon's former name Lisa was never revealed in canon).
* This game writes Eastern Zemurian names last-name-first (as in Japanese) and in Kanji, not Katakana. So for instance, Rem Misurugi Shizuna and Oderisi Luigi (Kurogane) are mentioned. Not all Eastern Zemurians have Chinese or Japanese names, a lot have Italian, Indian or Slavic names too, but they're still in Kanji (such as Mao Lyubomir's name being taken from Serbian, and Di Gregorio Salvatore and Oderisi Luigi AKA Kurogane having an Italian name).
* The best ending, Low Chaos, is non-canon, as it'd prevent Harwood from embracing his demonic side and would have him turn into a Spriggan and become more of a well-meaning anti-hero rather than becoming the Fourth Anguis that relishes in his evil that the canon Trails series establishes him as. However, Harwood from the Low Chaos ending makes an appearance (being called from another universe) in the next Trails arc after Kai.