Ooya, often called Lalo, is a humanoid figure distinguished by purple hair, white skin, and a head resembling a daikon radish. He acts as landlord to the main character, Milk Chan, living in a connected adjacent home accessible by ladder. His defining activity involves persistently pursuing overdue rent payments from Milk Chan, who is consistently over six months behind. However, Milk Chan routinely evades payment by employing shock tactics, tricks, or unsettling behavior, forcing Ooya to retreat to his own residence.

Personality-wise, Ooya displays notable anxiety, highlighted by an incident where he became distraught after mistakenly believing he lost his purse until quickly recovering it. He is openly gay, a trait explicitly disclosed in the Japanese version of episode 9, "Financial Decay Peninsula," and referenced in multiple episodes. His sexual orientation sometimes becomes a focus for jokes or manipulation, particularly in adaptations emphasizing cultural humor.

Background details remain minimal. His birth year is listed as 1970. Supplementary manga material indicates his favorite food is shabu-shabu. The character shows no significant development or expanded backstory beyond his recurring comedic role centered on rent collection attempts.