Been reading a lot of BloodyMary fics the past couple days and loving it. What a beautiful crossover! Gorgeous idea! We're gonna start with some ongoing fics I'm subscribed to right now, the fics I squee about when I get an email about a new chapter.

Beneath a Crimson Surface (16785 words) by VikCacao Rating: Mature Ongoing

Starting off with a merman twist on the Mutated!Simon trope! Very very tasty gore descriptions for those into body horror, visceral descriptions of fish cancer (author's words, not mine) and blood. It's a slower burn in developing Simon's character and his and Grace's relationship, but it's a comfortable, interesting burn. Very excited to see where this one goes!

And So Came the Butcher (14888 words) by chromevamp Rating: Explicit Ongoing

The classic, "Eridians/Grace find Simon out in space/on a blood moon and take him in, realise he's like a traumatised dog who alternates between biting you and cowering in a corner," idea! Also has "Simon hurts Grace in self defence/in a panic and Rocky wants to throw him out for the offense" trope, which I love. Rocky cares a lot about Grace in this one, very very concerned about his wellbeing, and Simon is Not having a great time to start out. Very nice tension and internal conflict for the boys, bed sharing and UST out the wazoo. Author also has funny author's notes that make me giggle.

Icarian (I Carry On) (11042 words) by aioxdotcom Rating: Explicit Ongoing

Oof. Danced a little in my bed when I saw the subscription email for this one come in yesterday! Just like the previous, this one explores Simon getting saved by Eridians and put into Grace's terrarium biosphere. Also has Simon taking one look at Grace and thinking he's an angel, but then he gets aggressive out of fear. A lot of good emotion in this one, Simon struggling to believe he's actually alive and protective Adrian and Rocky when he lashes out at Grace. Grace so very desperately just wants a hug.

Heroic Efforts (2667 words) by bakdooraccess Rating: Explicit First part in an ongoing series

Now... This is currently my top trans!Grace fic in the whole fandom. For me trans!character fics at best squick me out, or at worst make me dysphoric as hell. This one though? Feels real, grounded. Grace being trans isn't touched upon much in the first fic but it becomes very relevant in the sequel. An interesting exploration of cultural differences and identity, homophobia being more prominent in the second fic but in a way that feels real and true to the culture Simon is from. Highly recommend for hot hate sex and for character exploration!

losing streak (16108 words) by rosysoleil Rating: Mature Ongoing

This fic is honestly already perfectly described by one of the tags

simon thinks hes winning at 3d chess and grace is still trying to put the connect four board together

so it's hard to top that XD Though I'll try. Simon gets rescued onto the Hail Mary, and thinks the saving and nice treatment is all a trick and is trying to outsmart Grace, while Grace is just happy to have saved another human being and hopes they can at least be cordial. Simon is an absolute bitch in this, understandably, and it's so interesting to see his thought process contrasted to how Grace acts and thinks and makes decisions. Rocky is snarky and protective and emotional and I love it.

John 15:13 (10668 words) by Steampunker134 Rating: Mature Ongoing

Big old bag of religious trauma! PTSD! Guilt! Simon thinks Grace looks like something from heaven! Simon appearing out of thin air on the Hail Mary! Very beautiful prose in this one, and I love seeing Grace and Rocky's friendship from Simon's perspective.

Take Me (15575 words) by cinnab_ees Rating: Mature Ongoing

Here Grace is already established and teaching on Erid, and it's during one of his classes when Rocky comes barrelling in to tell him that they found something in orbit and Grace needs to come look, because they've found a submarine in space. A steady, grounded approach to the medical and emotional bits. Grace cares so much about everyone and everything that he might just lose it.

Leftover Light (56488 words) by atimefeeler Rating: Mature Ongoing

Here comes the big boy. The real chonker! Its dense and introspective prose gives you something to chew on, something to think about. It's a slower read and doesn't rush thoughts or relationships. I really enjoy the scientific descriptions and though I can't say how accurate they are, they don't break verisimilitude for me. The author is infectiously passionate about this story and I wait eagerly for the coming chapters.

And now, part two! Grace/Rocky

I never thought that

landslide (16791 words) by headfirstslide Rating: Explicit Ongoing

A real beast of a first chapter! Grace inadvertently explores his kinky side while goofing around with Rocky, and Rocky is very happy to assist in his kink awakenings! Bondage and dacryphilia and Rocky investigating human sexuality by dominating Grace. Very hot, love the emotions, lotta teasing.

Metamorphosis (18243 words) by Wickerton Rating: Explicit Ongoing

Grace is dying due to the taumoeba unfortunately poisoning him. He is slowly transformed into something between an Earthling and an Eridian after Rocky takes matters into his own claws. Or, to quote the second half of the summary;

Ryland Grace is transformed into something new and eventually cries as his alien best friend tops him

It spends a lot of time on the body horror of his transformation, Grace and Rocky's (and eventually Adrian's) relationship, and Eridian culture.

friend husband brother father (4198 words) by spqr Rating: Explicit First part of a somewhat connected series

spqr is The Bomb when it comes to xenophilia fics!! All of fics in the series (grocky works) are incredibly creative. Each fic takes a specific kink or idea and develops it into a tasty, tasty one shot. My favourites are definitely the first one and the second latest one as of this post, the fourth one in the series about Rocky being a living vibrator.

Various Way to Fist Your Alien Friend's Bump (0 words) by Anonymous Rating: Explicit Ongoing, work is solely art

A little different from the rest, but this is such amazing work and really gets into what I like about Grace/Rocky with their physical differences. Hot hot hot

Faraway saviour of dimmer stars (8170 words) by CinnamonBuns Rating: Explicit Complete

We get to see from Rocky's perspective how Grace is practically walking pornography and how it's not helping as he gets closer and closer to his heat. Extremely steamy mating, Grace swears. Highly recommend.

don't be so book smart, get a read on my heart (9572 words) by Possiblyenjoyable Rating: Explicit First in a series (two fics as of this post)

Read both! Read both of them, in one go, and melt from how fucking sexy these fics are. Grace gets a fun birthday gift in the first one, and gets revence in the second.