OAKLAND — Blood sugar levels … spiking. Cuteness sense … tingling. Hair … spontaneously forming into totes adorbs pigtails.

What is this palpable presence of sweetness and light and rainbows and photo-ops filling Oracle Arena in Oakland? Why, it’s Hello Kitty! In the fur!

She arrived in town Friday and is here through July 12 with her whole Kitty caboodle of a traveling stage show, providing stimulus and exclamation-point overload on the first 35-city tour of the Hello Kitty Supercute Friendship Festival, part of Miss Kitty’s not-so-subtle quest for world domination!

The ubiquitously cute Japanese feline character (is she a cat? a little girl?) is not just on your coin purse anymore. She’s in it, and cleaning it out. And she’s come to life in all her plushie merchandising splendor, dancing with her perky, furry, somewhat freaky friends in front of a big blowup rainbow, greeting children with paw-to-handshakes, and singing. Singing!

Pretty supercute and talented, considering she doesn’t appear to have a mouth.

“I didn’t think Hello Kitty could talk, so this is really exciting!” exclaimed Davinne Aurelio, 33, sporting a turquoise wig, glossy pink-purple mini kimono, black tights with Hello Kitty cutouts, Hello Kitty fingernail designs and requisite Hello Kitty red-bow barrette. Since childhood, the Hayward registered nurse has loved Hello Kitty because, “She’s so friendly and approachable and happy,” Aurelio said in a friendly, approachable and happy way. “But basically, we’re here to shop.”

Yes, this festival, coinciding with Kitty’s 40th birthday (roughly 280 in cat years? Meee-OWW!), is all about glitter and rainbows and happy happiness and feeding the Hello Kitty machine. The Oracle Arena floor — not long ago drenched in Golden State Warriors’ winning sweat — is currently covered in colorful booths selling everything from Hello Kitty light wands and Hello Kitty necklaces to Chococat (a furry friend) hoodies and Badtz-Maru (another friend) headbands, the kitschy Kittyness ranging from $10 to $70. VIP passes, at $250, get you in early to score cool stuff, complete with a special tote bag and meet-and-greet with Kitty herself.

Kitty lovers — hundreds of them, mostly young women and kids, but a few secretly-cuteness-loving dads — stand in line for temporary Kitty tattoos, learn to fold Kitty origami, color Kitty coloring books, or buy Hello Kitty Spam musubi kits ($20). Yes, you can shape your sushi rice into the likeness of Hello Kitty, top her with a slice of Spam, and just eat her all up!

Fans are encouraged to come dressed in full Kitty regalia. “There’s definitely a CosPlay feel to it,” said Sandra Yow, 29, a graphic designer from San Jose, adjusting her Kitty ears for a selfie with her friend. “There’s even a fashion show later in the day. It’s totally cute.”

For those not in the know, Hello Kitty (full name, Kitty White) was created by the Sanrio company in 1975 as a cute little cartoon character on a purse and has since become a global pop icon. She’ll even have her own movie in 2019! I sure hope she has a supercute little day planner to keep track of all this. Oh look, she does! Let’s buy it!!

Follow Angela Hill at Twitter.com/GiveEmHill.