...

How many times is this question going to pop up..?

To make variety, I'm not going to include anything that I've already done so I'll give the award to Erannie (Eren Jaëger X Annie Leonhardt (Attack on Titan))

WARNING: ATTACK ON TITAN SPOILERS

(This is really blurry but it's one of my favourites none the less)

Having been the top of his class in hand-to-hand, Eren Jaëger was a deadly opponent on the ground. The only reason he was so good was because he had help from another cadet, Annie Leonhardt, whose skills could have put her at the top had she not decided to appear lazy and bored all the time.

One of the biggest aspects between the two is their deep trust and respect for one another beyond their fighting skills. So when Annie betrayed Eren, he became extremely upset, and had less drive to harm/kill her than Armin and Mikasa did. It wasn't until he accepted the fact she was no longer his friend was he able to turn to a Titan. At the end of their fight, he was unable to kill her when he saw her crying.

I'm not sure what Annie thinks as only the OVA and manga extension 'Lost Girls' is from her perspective. But she was willing to open up to Eren (Mina was the only other) enough to teach him how to fight and she trusted him. It could be Annie was manipulated by Reiner Braun to betray Eren, but the reason isn't clear yet in either the manga or the anime.

Honourable Mention:

Eruri [Erwin Smith X Levi Ackerman] (Attack on Titan)

MikeNana [Mike Zacharias X Nanaba] (Attack on Titan)

Sadao Maou/Satan Jason X Emi Yusa/Emilia Justina/Emilia the Hero (The Devil is a Part-Timer!)

[That is a long ship name. I'm gonna call it MaouLia]

Credit to the wonderful artists:
1. Comment if you know them!
2. Rrra7
3. Comment if you know them!
4. Comment if you know them!
5. Actually from the anime

(Kind of wish more artists would put their username somewhere you could see it. I don't like typing 'comment if you know them!' because I feel like anyone could claim it was theirs.)