Esmerlina

Esmerlina is one of the side characters in Project Marigold. She is a young adult, weaponized Giant Corvine that serves the Outsiders as their guard.

Background
Esmerlina was one of three corvine eggs that the TFC stolen from another corvine that resided in Aperture. Ken, one of the former TFC members, stole Esmerlina's egg to give it to the Outsiders when he left the TFC.

Esmerlina then hatched, and was raised by Rosalina Marigold. When she started fledging, Ken gave her a helmet that he made himself.

The corvine then remained a member of the Outsiders since then, as she sees them as her family.

Project Marigold
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Project Marigold 2
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Project Marigold 3
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Personality
Not much is known about Esmerlina's personality. She appears to be rather obedient to the Outsiders and is rather defensive towards them, as she is a guard.

She is also rather hostile to strangers, as she flies in front of Coriander when she tells Pallas that now she knows why the Boss is after her in Project Marigold 1.

She also likes food, eating whatever is in the facility that she thinks is edible.

Appearance
Esmerlina is that of a standard corvine. She is huge, black, raptor and raven-like, and has white talons. Being a giant corvine, she has red eyes. Esmerlina wears a metal helmet that covers the top part of her head to her top beak.

Despite being a standard corvine, she has rather long feathers on her cheeks. This could've been a mutation but it's unknown why she has them.

Trivia

 * Esmerlina is the word "esmerillon" and the name "Merlina" combined.
 * She was originally going to be a common raven named Merlina, that assisted GLaDOS's three crows.
 * She was named after Merlina, one of the Tower of London ravens who sadly disappeared.