Haro's features include a limited range of speech, and the ability to hover (in environments with atmosphere and low gravity) by flapping its ear-like appendage coverings.
In Zeta Gundam, a mass-produced Mk-II version of Haro ends up in the hands of that series' main protagonist Kamille Bidan, who initially suspects it to be the original.
In Mobile Suit Gundam Unicorn, the main character Banagher Links owns a replica of the original Haro, which was given to him by his father when he was young.
Uso's Haro possesses a remarkably advanced artificial intelligence, and is even capable of controlling mobile suits, mimicking machine gun sounds, and projecting holographic images to intimidate the adversary.
Another notable Haro in Lacus's collection is "Navy-Chan", a navy blue robot on which she paints a mustache bearing a distinct resemblance the facial ornament of the ∀ Gundam of the CC (正歴 Seireki) calendar system.
The parody comic Mobile Suit Gundam SEED Club Yonkoma states that Athrun has built a total of 35 Haros for Lacus.
In this continuity, Pink-chan often adds "omae moda" or "you too" to its sentences, depending on the language he is in (you too for the English translation, and vice versa), and often reasonlessly interjects with "Haro!"
Pink-chan also often uses "Teyandei" (meaning "don't say a silly thing", a common reply in Manzai comedy) at seemingly random and nonsensical times.
In Mobile Suit Gundam 00, Celestial Being had produced unknown numbers of Haros as an assistant of daily maintenance works.
In the event of close combat, Lockon's Haro is able to pilot his Gundam for him while he uses his sniper rifle, and control the additional shields that Dynames receives in episode 6.
From Fereshte, Hanayo, a manmade AI that is of the same model as Lockon's Haro that is yellow in colour appears to resemble a cat, since it has a tail and cat-like ears which are always flapping.
The Haro in Mobile Suit Gundam AGE is created by main character Flit Asuno, later entrusted by him to his son Asemu, and inherited by his grandson Kio.
In the game, Mobile Suit Gundam SEED Never Ending Tomorrow and the remaster Mobile Suit Gundam SEED Never Ending Tomorrow R, there is a special mode called "Haro Madness" where the player fights gigantic versions of "Pink-Chan", "Navy-Chan", and a green Haro.
Additionally, in the early Super Famicom installments, the various forms of AI that controlled many common enemy units were represented by portraits of Haro.
In the Dynasty Warriors: Gundam series, enemies will occasionally drop power-ups resembling Haro with open wing flaps, which refills the player's health and special power bars to maximum.
If an alarm is set and time approaches, the Green Haro plays a tune (not the actual song) of Mobile Suit Gundam's OP theme, "Tobe!
Through the years, Japanese videogame publisher and toy maker Banpresto as well as other companies have released countless Haro products due to the character's immense popularity as a Gundam "mascot".
The merchandise includes T-shirts, wristbands, towels, circular or Haro-shaped calculators, room lights (including Planetarium-like lights and bath lights where you submerge Haro in water, activate him and he'll glow underwater), bath toys (a haro-shaped rubber duck that propels itself in water when activated), microphones and earphones, speakers, Haro-shaped CD players and cases, cell phone accessories, plush toys, cushions, and the short-lived "Haromatherapy" room freshener (pressing it makes Haro pop its ears and release scents to stimulate the olfactory senses).
Instead, it opens its "ears", takes out its hands and moves them back and forth while blinking its yellow eyes (instead of the conventional red) and speaking in an extremely loud voice.