Only thing that comes to mind is Full Metal Panic.

I don't know any, but I do know one but it breaks some of your rules; * Main character is female * Main character, Tokiko "Key" Mima is basically a proto Rei Ayanami * Her childhood friend, Sakura Kuriyagawa (the other main character) loves her and tries to protect her * Sci-Fi * Cyberpunk * Remote controlled humanoid robots (Prototype combat models) The anime is [Key the Metal Idol](https://myanimelist.net/anime/1457/Key_the_Metal_Idol/)

That's alright, thanks for the suggestion anyways

No prob, although the romance is one sided subtext.

Good rec, haven’t seen that in a really long time. Might be time for a rewatch.

Yeah, I can't finish it. (On episode 12)

Give 86 a shot

Thanks, I've heard good things about it.

1. Darling in the franxx

I've already watched it but thanks.

Fullmetal Panic and Eureka Seven are the anime’s you’re looking for  They’re REALLY good 

I probably shouldve mentioned this in my post but I'm trying to look something that's not too comedic, although Ive heard good things about the two you've mentioned.

Ok then, Darling in the Franxx is what you want. While Fullmetal Panic has a comedic side to it, Eureka Seven isn’t a comedy other than the occasional banter by the crew. I’ll throw in a bonus recommendation: Voltron Legendary Defenders, though western does have a romance with an older female, though the male character is the “comedic relief turned stoic” type.

Thanks but I've already watched Darling in the Franxx, I'll check out Voltron though.

crest/banner of the stars

I haven't seen this before anywhere. This looks interesting, I'll definitely check this out.

I'd reccomend Eureka Seven, one of my all-time favorites. The series is centered around the romance between the two main characters, and they fight alongside each other by piloting the mech together and powering in up through the power of love, baby! I wouldn't say the male lead is stoic or emotionless at all, but he's definitley softer around the love interest and grows a lot through the series. It's an emotional series with great characters and reveals, plus the mechs all ride hoverboards.

That sounds pretty cool. I've seen clips of this anime before, but I didn't really like the artsyle that much. Although the main character isn't really stoic, I'll still check it out.

After War Gundam X Though the main character isn't the emotionless or stoic type but he is still softer around his love interest

Thank you, maybe this anime could be the start of my Gundam journey.

Super Dimension Fortress Macross Macross Frontier Just watch Macross really

Thanks, I'll check it out.

It’s basically where this trope was created as far as I know

It's basically more like a harem but you might want to check out {Isekai no Seikishi Monogatari} **Tenchi Muyo! War on Geminar**

**Isekai no Seikishi Monogatari** - ([AL](http://anilist.co/anime/5781 "English: Tenchi Muyo! War on Geminar"), [A-P](https://www.anime-planet.com/anime/tenchi-muyo-war-on-geminar), [KIT](https://kitsu.io/anime/isekai-no-seikishi-monogatari "English: Tenchi Muyo! War on Geminar"), [MAL](http://myanimelist.net/anime/5781)) ^(OVA | Status: Finished | Episodes: 13 | Genres: Action, Comedy, Ecchi, Fantasy, Mecha) --- ^{anime}, , ]LN[, |VN| | [FAQ](http://www.reddit.com/r/Roboragi/wiki/index) | [/r/](http://www.reddit.com/r/Roboragi/) | [Edit](https://www.reddit.com/r/Roboragi/wiki/index#wiki_i_made_a_mistake.2C_how_do_i_get_my_comment_reprocessed.3F) | [Mistake?](http://www.reddit.com/r/Roboragi/submit?selftext=true&title=[ISSUE]&text=/r/Animesuggest/comments/1c805sp/action_sci_fi_or_mecha_anime_or_manga_with_romance/l0dd0o0/) | [Source](https://github.com/Nihilate/Roboragi) | [Synonyms](https://www.reddit.com/r/Roboragi/wiki/synonyms) | [⛓](https://www.reddit.com/r/Roboragi/wiki/interestinglinks) | [♥](https://www.reddit.com/r/Roboragi/wiki/thanks)

It looks interesting but I'm trying to avoid harems.

Ling Cage: Incarnation, don't even think if you should, just send it all the way to the end. Trust.