Found this online. Not sure I agree with the typings of some characters but close enough. Here's a quick enneagram test if you're interested:
https://www.enneastar.ch/en/2-minute-test
Type 1: 'Reformers' are principled and perfectionists; may appear aloof like a token Kuudere at first; Artoria is a textbook reformist
Type 2: 'Helpers' are giving, 'selfless' types... but can also be prone to being possessive like a Yandere a.k.a. Raiko
Type 3: 'Achievers' are very conscientious and hold themselves (and others) to high degrees much like the El-Melloi step-siblings
Type 4: 'Individualists' are quiet on the surface but have intense and expressive views - some can be Danderes; Morgan appears like one
Type 5: 'Investigators' are your stereotypical smarty pants; plenty can be scheming like Douman
Type 6: 'Loyalists' tend to have a strong sense of responsibility even if it's with anxiety like Eresh
Type 7: 'Enthusiasts' are those spontaneous, usually extraverted types; they're fun but potentially annoying too, like Merlin
Type 8: 'Challengers' are the alpha types; they tend to see themselves as leaders like Gilgamesh; can make a good Tsundere
Type 9: 'Peacemakers' tend to be the chillest types and have a "live and let live" attitude - unless they're in a war like Karna, I guess
Took the test and turns out I'm a Type 5 like my fellow writer, Hans; I find Type 8s to be the coolest though...