When he "discovers" things, he has an habit of saying "observation number one, two, three" and then speak the result of his analysis; the fact that he can successfully continue the counting throughout the series implies he has great memory. Astral's observations stopped after their first Duel with Kite Tenjo, which left him quiet and depressed.However, after their Duel with Fortuno, which restored his and Yuma's confidence, his observations returned. In the dub, this observation came with a "sub-observation" that he labelled #13-A.As Astral continues to learn about the human world, he showed great interest of feelings and friendship from observing Yuma and becoming more human in the process. During a Duel with Vetrix, Yuma started to eat the rice balls that Tori gave him prior to the Duel which allowed Astral, who was fused with him to feel the sensation of eating for the first time. He felt incredibly energetic and lively by the taste of the rice balls, stating he wanted to eat "two, or three" more of them, while cheerfully saying that being Yuma has been fun in a rather comedic instance.