Day 1 - Midgeknight

My Pandaren monk from World of Warcraft, Midgeknight. Named after my beloved and much missed Jack Russell

Day 2 - Childe the Hunter

Another World of Warcraft character, this time my blood elf hunter, Childe. Named after an old Devon legend (see here) that was turned into a Seth Lakeman song

Day 3 - Bettii Ratt

My Asuran Revenant, from Guild Wars 2. Named after the character of Betty in the comic Rat Queens

Day 4 - Cheers Love!

Tracer from Overwatch

Day 5 - I Am Your Shield

Reinhardt from Overwatch

Day 6 - Midgeknight 2

My Charr Ranger from Guild Wars 2, also named Midgeknight.

Day 7 - I Was Not Prepared

Illidan Stormrage from World of Warcraft, AKA By the Light, what did he do this time? Look, can we just get the Stormrage brothers to stop f*cking everything up?

Day 8 - I Am Here!

All Might, from the anime My Hero Academia

Day 9 - Yubaba

Yubaba from Studio Ghibli's Spirited Away

Day 10 - See You Space Cowboy

Spike, from Cowboy Bebop

Day 11 - Olivier Armstrong

Olivier Armstrong from Full Metal Alchemist

Day 12 - Gintoki

Gintoki from Gintama (with a cameo from Shinpachi)

Day 13 - The World is Cruel, But Also Very Beautiful

Mikasa Ackerman from Attack on Titan

Day 14 - The Net Is Vast And Infinite

Major Motoko Kusanagi from the original Ghost in the Shell anime (not the live action film) - what first got me into anime

Day 15 - I've Seen Things You People Couldn't Imagine

Rutger Hauer as Roy Batty from Blade Runner

Day 16 - Doc

Doc Holliday from the excellent Wynnona Earp TV show

Day 17 - Porg

A Porg, from Star Wars

Day 18 - Grandmaster

Meant to be Jeff Goldblum as the Grandmaster in Thor: Ragnarok.
Something went a bit wrong with this one

Day 19 - Hunter and Hunted

Ripley and the Xenomorph, from the Alien series

Day 20 - You've Got Red On You

Simon Pegg as Shaun from Shaun of the Dead

Day 21 - Panther

Chadwick Boseman as Black Panther

Day 22 - Wizzard

Rincewind the wiz(z)ard, from Terry Pratchett's Discworld series

Day 23 - Ginny Rides For You On The Wind

Deathface Ginny, from the Pretty Deadly graphic novels

Day 24 - Spider-Woman

Jessica Drew, Spider-Woman. Just because...

Day 25 - Crystal

Crystal Eyes from the underrated science fiction masterpiece of the same name (and it's equally excellent sequel, Sorrow's Herald). Their author, who you might be familiar with, thinks you should absolutely buy them from Amazon and give them a nice review, please and thank you.
And by "author", I mean me, just in case you didn't get it

Day 26 - Big Softy

Greebo, scourge of Lancre, Nanny Ogg's pet cat. From Terry Pratchett's Discworld

Day 27 - Aimee

Aimee Westmorland, the fast-living, devil-may-care mech pilot from yet another hugely underrated sci-fi masterpiece, The Salvager. Again, you should totally buy this one from Amazon as well.
What? Yes, okay, I wrote this one too.