Alignments are in-game groupings or categories that shows part of a Servant's Personality. Before the Kara no Kyoukai Collaboration, Alignments were considered as part of the flavour text in the game, for every servant's Biography. After the Kara no Kyoukai Collaboration, Mission System existed in various events which some of those missions consists of goals that requires the player to defeat a certain Servant with a certain Alignment.
There are Two Parts for Alignment.
The Axiomatic Axis: Lawful (秩序) - Neutral (中立) - Chaotic (混沌)
The Moral Axis: Good (善) - Balanced (中庸) - Evil (惡)
The exceptional cases are the "Madness" (狂) Alignment which is only for Berserkers who lost all their sanity. (eg : Heracles and Lancelot), the "Bride" (花嫁) Alignment for Nero Claudius (Bride) and also the "Summer" (夏) Alignment for Tamamo-no-Mae (Lancer).
|Lawful Good||Neutral Good||Chaotic Good|
|Lawful Balanced||Neutral Balanced||Chaotic Balanced|
|Lawful Evil||Neutral Evil||Chaotic Evil|
|Lawful Madness||No Alignment||Chaotic Madness|
|Neutral Summer||Chaotic Summer|