From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
Midori has big curly blonde hair. In her appearance in Dragon Ball, she wears a pink dress. One notable trait about her appearance is that she looks similar to Akane, which Akane then used as a prank on Senbei by dressing up as her. During the Penguin Village Grand Prix Race, Midori and Akane teamed up and attempted to cheat by having the other hide near the finish line to be ahead of everyone, but failed because of falling down a cliff.
Dr. Slump Arale-chan
She was first introduced as Arale Norimaki's middle school teacher, where she instantly became Senbei's dream girl.
Early relationship with Senbei
Prior to their marriage, Midori was the target for many Senbei's perverted schemes though Midori was unaware of it most of the time. Senbei goes through the trouble of setting up a chain reaction involving many animals to end making a wind to blow her dress up to see her panties when passing by his house, but ended up failing twice because the first time she wore pants and the second time a farmer got in the way. Another time, Senbei planted a camera into Arale so he can see what she sees and had her go to Midori's apartment to have a bath with her, but since Arale took her glasses off in the bath, Senbei could only see blurry images of Midori.
On their first date they went for a drive in space with his flying car, but since the doctor had to poop, they had to make an emergency landing on a star where Midori was kidnapped and almost eaten by a giant alien monster similar to an Ape. Senbei attempts to save Midori by morphing the Ape creature into an Ant using the Ponpoko Morph Gun in order smash the Ant. Unfortunately, Midori was also turned into an Ant and the Ant Senbei smashed was actually Midori, causing her to get mad at him when he morphed her back.
When bringing some giant-sized carrots over to Senbei's house, she goes to use the bathroom and as Senbei is walking passed it, he talks to himself and says will you marry me. Midori who is within earshot agrees to it and their wedding occurs.
While preparing for their honeymoon which was going to be in space, Midori was kidnapped by some black Cat-like creatures in a flying canoe and taken to an island where she was tied up as an offering to a giant Ape. Once the giant Ape gets her, she is taken to the top of a mountain where she gets stripped naked and thrown into a pot of boiling water to be cooked and eaten. Senbei, Arale, and Gatchan find Midori after following the signal on the Lost-N-Found badge she was wearing and destroys the mountain and defeats the Ape. Midori, who was still in the pot, is taken away by the Apes' friend who is a Caveboy with a giant fork. She was taken to Torishima (an island that is also a giant flying Bird) where she is now in a squash. She is rescued when Senbei flys to the island holding Gatchan and pulls her out of the pot while she is still wearing the squash. Midori ends up falling when Senbei lets go after she kisses him for saving her. After landing on the ground, Midori witnesses the battle between Arale and the Caveboy who has equal strength and abilities as her, and then the battle between Senbei and a giant Crab. After the battle is over, Midori and the others get into Senbei's ship and fly off, but the Caveboy wakes up and blasts it down with an N'cha Cannon, making them have to go back to Penguin Village by Gatchan pulling them there. After their marriage, she has a son with Senbei named Turbo.
In Dr. Slump, Midori's character design was completely changed by changing her hairstyle and hair color. She also married Senbei earlier in the series.