JikuPiku

"My dear little Pieck"

- Zeke talking about Pieck

JikuPiku is the het ship between Zeke Jaeger and Pieck Finger from the Attack on Titan fandom.

Canon
Both Pieck and Zeke are warriors from the Warrior Unit with Pieck inheriting the Cart Titan, and Zeke being the inheritor of the Beast Titan until his death.

The two participated fighting against the Survey Corps in the Battle of Shiganshina District, with Pieck providing boulders and Zeke smashing it into pieces to throw at the charging scouts who all but one died, including the commander. However Zeke is soon stopped by Levi as he cuts him from the nape of his tian freeing Zeke, before Levi can kill Zeke, Pieck saves Zeke just in time in her Cart Titan form before retreating back to Reiner and heading back to their homeland, Marley.

Fanon
The ship itself isn't quite popular due to having much popular rivals like PokkoPiku.