Nuku Nuku is a fun. It's got the catgirl, robots, big business, a school, a restaurant, the beach, and space. Mash it all together and you've got wacky 90s anime. Story Don't take it too seriously. It's just there. Here is the lowdown: The father and mother are divorced. The mother is the president of a business conglomerate that builds weapons for the military. The father has custody of the son. To alleviate his loneliness, the father makes his son a companion: a battle android with a cat's brain. Why? Because anime. The episodes follow the catgirl, Nuku Nuku, and her shenanigans with the father, son,mother, and misc characters. In most of the episodes, the mother tries to gain the favor of her son by sabotaging the father and Nuku Nuku. Her attempts involve robots, missiles, and her henchwomen. It's lighthearted, cartoony fun.

My fave episode plot: Nuku Nuku goes ham on Ryuunosuke's bike and wrecks it. She gets a job as a waitress to buy him a new one. Being a cute catgirl, she's a huge hit at the restaurant. The henchwomen get jealous and try to spoil the restaurant. Hijinks ensue.

Characters
The characters are one-dimentional and goofy. Nuku Nuku is our catgirl android. She's mostly indestructible and has the brains of a cat. You can think of her as A-ko (of Project A-ko) but a cat. There is the father, Kyusaku, and he's your stand-in for the neglectful, science researcher dad. Think Gendo from Evangelion but not that much of an asshole. There is the son, Ryuunosuke, who is a basic bratty kid. Akiko is the mother. You can think of her as Heihachi from Tekken minus the lightning. She runs a big military contractor conglomerate and is focused on her business but also wants a part of her son's life. There are the two henchwomen and then a rogue android girl.

They are not multi-layered characters who are the pinnacle of genius writing. They're just fun.

Art
The art is clearly from the 90s - it's in the 90s style, has faded colors, and some repeated sequences. Still though, you get some decent character designs, kinetic action sequences, and adequate visual quality. It's not the best but will not kill the experience.

Sound
The VA is good. Nuku Nuku sounds cute and quirky without being loli. The mother character does the same laugh as Kodachi from Ranma (same VA, I knew it!).

The music is actually pretty good. The OPs and EDs are sung by Nuku's VA who sings in an actual singing voice. They're cute and upbeat, befitting of this anime. They have separate OPs and EDs for eps 1-3 and 4-6. I liked the 4-6 ones better. They are happy 90s pop music.

Enjoyment and Overall
I liked this anime. It's not top of the mountain stuff, not pushing the creative envelope, and not a critique on the human condition. They're goofy non-sense fun with a family's cat girl android. It's a cute and happy time filler.

Note: I watched this concurrently with Nekopara, another catgirl anime. I'm not all the way through that one yet, but I have to say that Nuku Nuku is the better of the two. I like the excitement, the wackiness, and the voice acting.