Charredasperityさんのイラストまとめ

12 - Paul Bunyan

Although currently limited, she does come back multiple times and eventually becomes permanent after an update making rare prism quests accessible for free.

She gives buster up, and healing, as well as def down for enemies.

11 - Georgios

The Decoy Servant, he has a 3-turn taunt skill that combined with his guts skill, healing skill, and naturally high defense for his rarity allow him to take 3 otherwise lethal attacks away from an enemy. Use him with a Berserker to keep them alive.

10 - Mozart

Basically the arts version of Shakespeare, he buffs an arts np. Unfortunately he lacks any np charge, so make sure the servant you're supporting has an np charging skill. Really only recommended if you have no other options currently.

9. William Shakespeare

He exists to buff a buster servant's NP damage considerably for one turn, and his 20% np up can charge one holding a Kaleidoscope CE.
After this, however he serves little use.

7 - Helena Blavatsky

One of the most straightforward supports, she grants teamwide NP charge, teamwide card effectiveness up, and 3 turn star-gen. She also has an 80% chance to boost her own NP damage granting her one of the strongest aoe caster NPs in FGO, to clear a wave.

6 - Chen Gong
Basically the Anti-Arash, his NP destroys the leftmost ally while dealing nearly unmatched aoe damage in the process, meaning you can use another supports skills, and then bring in someone else.
he also grants small def up and np charge, and massive 1-turn buster up

4 - Mash
Don't let the fact she's free fool you, she's one of the most effective defensive supports there is. granting a def buff that can tank some AOE NPs on her first skill, a targetable invincibility on her 2nd, and a taunt that draw attacks on her 3rd.

Who's cuter, Tails or Klonoa?

@idiotmeo Danketta? :)

12. Well, I already said Undertale, so