Why does Hope eyes turn green?
I've observed that when hope is upset or nervous her eyes turn green, when she's happy/mellow they turn blue and when she's feeling badass they are brown.
She has wavy auburn or dark brown hair that is seen in many styles. She has bright light-colored blue eyes and full lips.
She has bright light-colored blue eyes and full lips. She wears relaxed yet edgy clothing that compliments her curvy figure. She is always seen wearing her mother's stone necklace, a Mikaelson family crest necklace, and earrings.
When Hope Mikaelson gives in to the idea of needing a friend, Josie Saltzman is one of the first people she bonds with. They had known each other for years since Hope started at the Salvatore School and eventually became close friends.
She will age like a normal human (same as a witches and werewolves age), however when she dies she will become a vampire if she chooses to complete the transition (because of dying with vampire blood, her fathers blood in her system).
About Hope Mikaelson:
Hope Mikaelson is the only character that is hybrid of all three bloodlines: werewolf, witch, and vampire. Her father, Niklaus Mikaelson, was also the original vampire-werewolf hybrid. The witch legacy also comes from the Mikaelson line from when her family was witches before becoming vampires.
Weaknesses. Broken Neck: Breaking an Original Immortal Tribrid's neck will results in their unconsciousnessness. The Cure: If an Original Immortal Tribrid takes the cure, they will revert back to being a werewolf again.
Weaknesses. Immortal tribrids can be killed via decapitation and heart extraction. If an immortal tribrid is bound and deprived of their werewolf nature they can then burn to death in the sunlight with a daylight amulet.
About Hope Mikaelson: She is the daughter of Niklaus Mikaelson and Hayley Marshall-Kenner, which makes her the only tribrid on the series. Hope Mikaelson is the only character that is hybrid of all three bloodlines: werewolf, witch, and vampire.
Dianna Monet Mikaelsson (nee Labonair) is an Original Immortal Tribrid. She is the daughter of Alaina Olsen and Cyrus Labonair. She is the wife of Elijah Mikaelson, adoptive mother of Saga Mikaelssen, and the mother of Olympia Mikaelson.
Can Hope Mikaelson be Immortal?
No, she isn't Immortal. If she does, she wouldn't age, and we all know she ages. Yes, she has Vampiric blood in her veins, but that's about it. Hope is basically exactly like a human fed/injected with vampire blood, the only difference is that she naturally generates it.
Henrik is the tribrid son of Niklaus Mikaelson and Hayley Marshall-Kenner. He is the twin brother of Hope Mikaelson and the paternal older half-brother of Octavia and Remus Mikaelson.

Known Tribrids
Henrik is the second hybrid born with traits of all three supernatural species; Vampire, Werewolf, and Witch. Octavia is the third hybrid born with traits of all three supernatural species; Vampire, Werewolf, and Witch.
Later Roman meets Hope in the library and they discuss the latest update in the search for Hayley, which leads the two to share their first kiss.
With the priest's death, Hope's werewolf curse is triggered, because just being a witch possessed by an ancient evil wasn't enough for one teenager on The Originals.
No, she isn't Immortal. If she does, she wouldn't age, and we all know she ages. Yes, she has Vampiric blood in her veins, but that's about it. Hope is basically exactly like a human fed/injected with vampire blood, the only difference is that she naturally generates it.
Hope ultimately fulfills her destiny in the beginning of Season 4, activating her powers to finally kill the series' big bad “Malivore” by stabbing Landon (whose body had been inhabited by Malivore). The emotional weight of it all causes her humanity to turn off.
The Hybrid Curse suppressed that power for 1000 years but it was always there and when Hope inherited it without being under any curse having been put on her, she could turn werewolves into Hybrids with solely her own blood.