Grandma Future debuted in Underground, where she was seen viewing various monitors that were linked up to security cameras scattered throughout the city. Grandma Future tracked Team Core-Tech's movements throughout Axistown and greeted them at her home. When Chase asked her about the whereabouts of his father, Grandma Future lied about knowing anything about Jeredy Suno and told Chase that Jeredy went to The Underground to confront Mr. Black. After Team Core-Tech left for the Underground, Grandma Future informed Mr. Black of the team's impending arrival. At the end of the episode, Grandma Future berated Mr. Black on his failure to take Team Core-Tech's Monsunos.