In Season 3 Episode 21, the previous Attack Titan, Eren Kruger, tells Grisha Yeager to complete his mission if he wants to save Mikasa and Armin before injecting him with the Titan spinal fluid ...

In his conversation with Zeke in Paths, Armin tells him of a memory from his childhood, when he, Eren, and Mikasa all raced to a tree. Mikasa would purposely lag behind Eren, so he could win ...