A Regular Octoling.
Personally, I think Octolings look very cute, perhaps cuter than their Inkling rivals. They are like little walking red-haired dolls that enjoy mischief in their attacks.
And there are three fun things about them:
1. Some really like Octolings so much, that they will even hack the game just to play as an Octoling (so players in their servers will have their games corrupted until they leave).
"You should not forget about my friend Pearl, you know. We would not be successful without each other's help."
2. Because Marina is a black-haired Octoling (and her dark-skin and her clothing can make her stand out against all the other known Octolings), a possible story of her life as an Elite Octoling and her journey to Inkopolis will make an interesting story.
But even then, just because her status as an Octoling makes her more popular than her friend Pearl, it does not mean that we should leave Pearl behind. She also needs love and attention, too.
3. "Deratako[zonesu]", the name for an Elite Octoling (that means "decorated octopus Amazon"), is a nice-sounding name.