Luminescent Blush

Anime & Manga

 * Though everyone blushes at one time or another in Higurashi: When They Cry, Rena and Keiichi tend to (manga only) blush a lot, both in standard form and due to stress/fear.
 * Yurie from Kamichu! does this a lot, especially when it has to do with Kenji. Her younger brother Shoukichi also tends to do this around Miko.
 * In Act 2 of Sailor Moon Crystal, Usagi blushes when she makes a mental note that her new acquaintance Ami is cute, and Ami, having been friendless, blushes whenever Usagi's affectionate, like when she hugs Ami effusively, tells her she's cuter when she smiles, and when she agrees to be friends.

Western Animation

 * The Loud House:
 * In the episode "Linc or Swim", Lisa uses a formula that eliminates urine in the pool; when all the water evaporates, the rest of Lincoln's sisters (minus Lily) blush in embarrassment.
 * In "Study Muffin", all of Lincoln's sisters (minus Lily, presumably since she's a baby) do this when they see Hugh. Hugh himself does this when Lisa lifts up his shirt.
 * Pearl from Steven Universe blushes quite a bit (and her blush is a bluish tint thanks to her skin color being pearly-white).
 * Connie has a few in "An Indirect Kiss", and with the last one at the end of the episode, her eyesight is magically healed by Steven's magical saliva from the juice box.
 * Near the end of "Barn Mates", the resident Tsundere Lapis Lazuli does this when Peridot smiles and giggles at her.
 * In "Change Your Mind", White Diamond blushes pink after Steven points out she's acting like a child after her temper tantrum. Her "flaw" winds up spreading to her puppet Gems and even to her headship, who in turn blush pink as well. The blush is implied to be literally luminescent, too: the entire previously white room turned pink as well.