Remember about a week ago when I said that the baby panda in “Born in China” was the most adorable creature on earth? That may still be, but Baby Groot is probably the most adorable baby in the universe. “Guardians of the Galaxy, Vol 2” opens up with a bang — a wild action scene as our heroes and anti-heroes fight a huge monster that is out of focus and at the side of the screen as we watch Baby Groot happily dancing to ELO’s lilting “Mr. Blue Sky.”

“A little good, a little bad, bit of both,” Peter Quill (Chris Pratt) promised his fellow Guardians and us at the end of the first film. And that’s what we get in this sequel, still delightfully off-kilter, still deliciously irreverent, and still delectably scored with 70’s pop songs. “Can you hold the banter until after the space battle?” one character asks. Probably not, and we would not want it any other way.

Despite the indicators the in post-credits scene from the first film, it is a relief to report that this movie is not about Thanos or another infinity stone. It is a more personal story, giving the characters a chance to know each other and us to know them, too.

Peter was born in Missouri to a single mother who died of cancer when he was ten, then captured by the blue-faced space pirate Yondu (Michael Rooker), who was hired to deliver him to his father but instead kept him as a sort of mascot/apprentice. In Vol 2 Peter meets his father, a “celestial” named Ego (really) with his own planet. And Zamora (Zoe Saldana) meets up with her estranged sister Nebula (Karen Gillan). I don’t mean “estranged” like having trouble agreeing on what to get Mom for Mother’s Day; I mean estranged like trying to kill one another.

Ego is accompanied by a new character named Mantis (Pom Klementieff) a shy and inexperienced empath who can read and sooth the emotions of others. As Peter gets to know his father, and even achieve his boyhood dream of tossing a ball back and forth with him, in typically off-kilter Guardians of the Galaxy way, the group is being chased down by a race of beautiful gold people who claim to be genetically perfect, led by Ayesha (Elizabeth Debicki), via drone-style attack ships. Rocket (Bradley Cooper) could not resist stealing some of their precious batteries, the very ones Ayesha had hired them to protect. They are also being sought after by Yondu, who was expelled from the tribe of space thieves led by Sylvester Stallone (really, and it kind of makes sense because he does look and sound like an alien) for keeping Peter; kids are supposed to be off limits.

The banter is fine; with very funny references to “Cheers” and to David Hasselhoff and “Knight Rider.” The visuals are imaginative and striking and the battle scenes well staged. I got lost in the last one, but maybe we are supposed to. Writer/director James Gunn has an outstanding sense of pacing and tone. And I like the X-Men-style shifts of alliance. It is especially appropriate for characters who are “a little good, a little bad” to be surrounded by characters who are, too. While the father-son dynamic story does not always work, Baby Groot more than makes up for it, not just in adorable quotient but in what we learn in seeing the other characters interact with him.

“All any of you do is yell at each other,” Nebula correctly points out. “You are not friends.” “No, we are family,” Drax (Dave Bautista) replies. And we’re starting to feel like they’re our family, too.

NOTE: Stay all the way to the end for several extra scenes. You won’t want to miss the one with Groot.

Parents should know that this film includes extended sci-fi/comic book/action violence and peril with some disturbing images, characters injured and killed, some strong language, sexual references and and potty humor.

Family discussion: How did meeting his father change Peter’s view of family? Which switch of allegiance was most surprising?

If you like this, try: “Guardians of the Galaxy” and “The Avengers”