Astarlan

Astarlan is the het ship between Asta and Arlan from the Honkai Star Rail fandom.

Canon
The two are shown to have a work relationship of lead astronomer and head of security department in.

An Unexpected Turn of Events
During the "An Unexpected Turn of Events" Companion Mission, if the Trailblazer returns to the space station, Asta message him/her. Asta informs the Trailblazer that there is something she can only discuss with him/her. However, this bothers the Trailblazer, or perhaps he/she just don't want to bother Asta, so he/she back to the Express. Asta tells the Trailblazer that something urgent happen. Asta also sends a message asking him/her to stop teasing. She told Trailblazer to meet her in her usual spot in the space station.

When the Trailblazer approach Asta in the Master Control Zone, Asta seems to have encountered something worrying her. Asta is glad that the Trailblazer arrived at her usual spot. She reported an urgent incident to the Trailblazer, namely the disappearance of Arlan. The Trailblazer ask her if checked the surveillance cameras but, they were destroyed when the Legion invaded which it hasn't been fully repaired. Asta also told the Trailblazer that it's been thirteen hours since Arlan last contacted her. She also told the Trailblazer that Arlan usually takes less than 13 seconds to reply to her messages.

Asta even admits to the Trailblazer that she has been looking for Arlan everywhere and she couldn't find him. She even looked through the work plan records of the Security Department and and she found something.. She look at Arlan's last work objectives entry, "Of the heart. Of the mirror. Asta founded strange while Trailblazer founded odd. Asta informs the Trailblazer that Arlan never written poetry before. She even asked people in the Security Department, but none of them thought it was concerning. They said stuff to Asta like:

"Brother Arlan is a grown man with his own plans!"

- Security Department, "An Unexpected Turn of Events"

But they couldn't get to listen to Asta, so she asked the Trailblazer for help. The Trailblazer tells to Asta, she hasn't even have any clues or Arlan as his age just need "alone time" sometimes. Asta, however, asked the Trailblazer to stop fooling around and help her, saying that he/she is acting like those Security Department idiots.

At least Asta has her secret weapon. She introduces her dog, Peppy, to the Trailblazer. She also tells the Trailblazer that Arlan looked after him since he was a puppy and they're great friends. Asta tells the Trailblazer that Peppy knows Arlan's scent and maybe he can track him down. But Peppy can't go alone because if he gets lost, and Asta can't go with him. People might also see her as the acting lead researcher, searching for Arlan and that make Arlan look incompetent as head of the Security Department.

After talking to Professor Capote, Capote's fans, and Dan Heng with the Security Department. The Trailblazer gather all the clues and tell it to Asta. Asta is so sorry for never knew she was giving Arlan so much pressure. Asta and the Trailblazer notice Arlan's shoe size, Asta even tells the Trailblazer that is the pair of shoes she bought for him. They skip the clues and find Arlan quickly. Asta also need to apologize to Arlan in person as well.

Messages
(Through the in-game messages feature in Honkai Star Rail, closer interactions between them are shown.)

Arlan: (Trailblazer), which color do you think suits me better, blue or grey?

Arlan: As a friend, please choose based on your first impression


 * Blue
 * (Trailblazer): Blue? It's the same color as your uniform
 * Arlan: Hehe, I knew blue suits me
 * Arlan: It seems we have the same fashion sense!
 * Gray
 * (Trailblazer): Gray? It's a similar shade to your hair
 * Arlan: Gray... could work!
 * Arlan: Since you said gray suits me, I'll buy it and try it out
 * Are you hacked?
 * (Trailblazer): Send me a selfie to prove that you are not hacked. You are a bit abnormal
 * Arlan: Abnormal? I'm just a little excited
 * Arlan: Forget it! I'll just buy both of them, then I'll know which color suits me better
 * Arlan: I'm going to buy a new pair of training shoes, so I'm asking for your opinion as a friend
 * Arlan: I'll take a picture for you when they arrive
 * Arlan: *message sticker thumbs up*
 * (Trailblazer): Give him back the phone
 * (Trailblazer): Asta, stop playing around
 * Arlan: Eh? You got me. Don't I sound like Arlan?
 * Arlan: He edited the message to you multiple times but didn't send it
 * Arlan: Sorry, Miss Asta just borrowed my phone
 * Arlan: I'm sorry to have bothered you. It won't happen again
 * Arlan: Sorry, Miss Asta just borrowed my phone
 * Arlan: I'm sorry to have bothered you. It won't happen again

Arlan: I'll chat with you later. Miss Asta is starting to look for her payment encryption key. I can't let her find it

— Asta steals Arlan's phone while shopping

Quotes
"*sigh* ...I don't know why, but it seems like I manage to annoy Lady Asta fairly regularly."

- Arlan (About Asta) "Arlan's always saying stuff like, "all of you must heed Lead Researcher Asta's judgment!" Then when I remind him that that includes him, he says, "don't worry, I have my own judgment.""

- Asta (About Arlan)

"Oh, man! The phone case shipping location is too far from the space station — you have to buy 5000 units for them to deliver... Wait, please don't tell Lady Asta that."

- Arlan (About Asta)

Fanon
The pair are depicted closer in numerous works by fans which often feature, Asta's dog who is usually seen with Arlan more often. After the release of the game, the fans began shipping these two. Some fans perceived their connection as that of a married couple since they both take care of Peppy while in the Space Station. Asta feels horrible for Arlan, who is overworked a lot on the Space Station, their companion quest has received many compliments from fans. There are 31 works of Arlan/Asta on AO3.

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