#side note thalassa seems surprised when phoenix mentions apollo and trucy dont know they're siblings. something about that is funny to me

[jynxedshapeshifter]

Another possibility for Trucy and Apollo finding out they're siblings just occurred to me. What if they find out by accident?

Trucy knows Thalassa's her mom. Like just to be clear. Phoenix asks Trucy about her in the 2019 section of the MASON System sequence in Turnabout Succession and Trucy says she "disappeared" and mentions her by name.

Now keeping this in mind, there are several ways for Trucy and Apollo to accidentally find out they're siblings.

Trucy recognizes Apollo's bracelet as identical to Thalassa's, which I don't think is likely because I feel like that should've happened already with how perceptive Trucy is without hyper-empathy

One of them gets their hands on a picture of Thalassa. Trucy mentions that Thalassa is her mom, Apollo points out that his bracelet looks identical to Thalassa's, and they think for a few seconds before realizing Thalassa must be Apollo's mom too

Trucy mentions she got her hyper-empathy from her mom, and her mom got it from her dad (Trucy's grandfather), leading her to realize the ability is genetic, so the only way Apollo could feasibly have it is if he's a Gramarye, leading them to the conclusion that they're siblings

In any case they confront Phoenix about it and Phoenix panics a bit, and when Phoenix says he needs to talk to Thalassa before they have this discussion and just makes them even more upset because "what the hell do you mean you need to talk to her? How long have you been in contact with our mom???" which makes Phoenix panic even more.

No matter how they find out, I, at the very least, want the fact that Phoenix and Thalassa haven't told Apollo and Trucy they're half-siblings to bite Phoenix in the ass, if not both Phoenix and Thalassa. Like Apollo's an adult and Trucy's almost an adult, I feel like maybe they should know by now?