The original Haro is a little robot companion built by the main character Amuro Ray. It is a cute testament to Amuro’s exceptional talent for machines. 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.

Haro can usually be found rolling behind Amuro’s next door neighbor Frau Bow. Maybe the most amazing function of Haro is the ability to detect brain waves. In one of the episodes, Haro actually claimed that the brain wave of Amuro is lowered/different.

In Zeta Gundam, a mass-produced Mk-II version of Haro ends up in the hands of that series’s main protagonist Kamille Bidan, who at least initially suspects it to be the original. He repairs the robot, only to have it constantly address him as Amuro.

During the events of Char’s Counterattack, Amuro gives a “third-generation” Haro to Hathaway, the son of his captain Bright Noah.

In the manga Crossbone Gundam, penned by Gundam creator Yoshiyuki Tomino, Berah Ronah has a robotic parrot named Haro, which refers to her as “Matilda-san”. This seems to imply that her Haro is (or was made from the remains of) Amuro Ray’s Haro, since it mistakes Berah for the redheaded Lieutenant Matilda Adjan, who appears in the original series.

In Victory Gundam, the main character Usso has a Haro replica that he received from his father. Usso’s Haro possesses a remarkably advanced artificial intelligence, and is even capable of controlling mobile suits, mimicking machine gun sounds and project holographic images to intimidate the adversary.

Haro continues to permeate the Gundam franchise, having appeared in Gundam SEED as Lacus Clyne’s multi-colored horde of simple-speech robot pets, built for her by Athrun Zala. These Haros are roughly 1/4 the size of their Universal Century counterparts and are similar in function, however a few possess certain abilities such as unlocking doors.

Lacus’s favorite Haro is a pink machine that she refers to as “Pink-Chan” (often translated as “Mr. Pink” or “Pinky”). Another notable Haro in Lacus’s collection is “Navy-Chan”, a navy blue robot on which she paints a mustache bearing a distinct resmemblance the facial ornament of the ∀ Gundam of the CC (正歴 Seireki) calendar system.

The rest of Lacus’ Haros have been seen in yellow, orange, blue, green, and black. 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 mona” 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!”

In Gundam SEED Destiny, Lacus impersonator Meer Campbell is often seen with her own red Haro. Unlike other Haros, which speak Japanese, “Mister Red” speaks in English.

wikipedia.org