Abusive Parents: Kallian and Tyrea are both victims of this.
Dark Is Not Evil: Machina already represent this to a degree, but it's even more apparent, given Egil's the protagonist and not an antagonist in this fanfiction.
Defiant Captive: The Machina when they are taken hostage by colony 6.
Older Than They Look: Every party member as a result of not being human, are older than they appear. Egil Vanea and Linada are over 1000 years old, Kallian is 151, Tyrea is unknown but she has to be older than 100, and Oka is 36. Alvis has been around since before the universe began, so he's the oldest.
Egil
Has a Type: Egil seems to have a thing for purple philosophical men.
Like Father, Unlike Son: Miqol and Egil are very much at odds when it comes to the Machina and what has happened, to the point where Egil no longer refers to Miqol as his father.