In the second above-mentioned episode, this card appears in Astral's explanation when he explains in detail to Yuma about the "Numbers" and how they work.
In episode 3, this card appears in a flashback Astral has when he notes even though his memories have been trapped in 99 different "Numbers" and then scattered, his memories won't return until he gathers them all.
In episode 25, this card appears in a flashback Astral has when he reminds Yuma that they both know that Kite can control the "Numbers" at will unlike other cases they have seen.
This card also appears in a flashback Kite Tenjo has after he arrives at the Duel Square and wonders if the memories he's scanning here are Astral's memories.