As the leader of the SPACE PIRATES, CAPT. SPACEBOY is an adventurous man who desires to explore the galaxies and seeks a greater purpose in his life. He is also shown to be deeply sensitive towards those he cares about, notably his father PINKBEARD and former wife SWEETHEART. CAPT. SPACEBOY notably appears to be a talented musician as he created his own SPECIAL MIXTAPE out of his love for SWEETHEART. His loyal SPACE PIRATES describe him as a competent leader with a strong amount of bravery and courage.

However, CAPT. SPACEBOY does possess a rather emotional persona whenever he suffers under his breakup with SWEETHEART or her overbearing personality. This transforms him into the vengeful SPACE EX-BOYFRIEND, who only comes out only if SPACEBOY is angry. In this form, SPACEBOY's personality takes a negative turn as he desires revenge against SWEETHEART for breaking his heart and will harm anyone who tries to interfere out of pure rage.

Despite this, he eventually returns to his old self and is amicable towards OMORI and friends. However, SPACEBOY's second breakup with SWEETHEART turns him into a emotionally despondent figure, becoming the nearly-catatonic SPACE EX-HUSBAND. Having no will to continue living, SPACE EX-HUSBAND loses all purpose in life and deeply misses SWEETHEART, constantly recalling any memory he spent with her. However, he snaps out of this state once OMORI and friends help him regain purpose and his life back on track.