Bring it on mage
~ Eridan before fighting Sollux
Eridan Ampora is an antagonist in Andrew Hussie's webcomic Homestuck. He is a violet-blooded troll (second highest on the Hemospectrum) with a serious genocide complex, who thinks magic is fakey fake BS.

Act 5 Act 1

Eridan was Vriska Sekets rival and was currently dating Feferi Peixes. Vriska and Eridan's rivalry died out and Eridans new rival was Sollux Captor. Eridan always tries to be rivals with Vriska again but always failed. Feferi broke up with Eridan overtime making Eridan lonely 

Act 5 Act 2

Eridan told Feferi and Sollux that he would join Jack Noir to become stronger and invincible. When he told this to Feferi and Sollux they were both enraged by Eridans betrayal. Sollux began to fight Eridan and Eridan knocked him out. Feferi, thinking Sollux was dead, attacked Eridan but Eridan shot her through the bladder-based aquatic vascular system (heart). He then proceeds to destroy the Matriorb, the only hope for his kind's future (so far), fitting his title as the Prince (destroyer) of Hope.

Kanaya sees this and attempts to kill Eridan only to be killed via a blast through the stomach. Eridan then meets up with Gamzee Makara and Vriska Serket. Before the three can go into deadly combat Kanaya (who revived herself via dubious methods) interrupted and sliced Eridan in half, killing him.

Eridan killed by Kanaya

Act 6 Act 2

Eridan makes a comeback in Act 6 Act 2 as a ghost in his God Tier form. Eridan is revealed when Rose introduces him.

Eridans ghost in God Tier form

Act 6 Act 3

Eridans ghost is seen at the end of Act 6 Act 3. He is seen in a dream bubble were everyone else was at before the bubble was destroyed by Lord English instantly killing Eridan as well as everyone else in the dream bubble at the time.

Act 6 Act 5 Act 1

Eridan makes an appearance in Act 6 Act 6 Act 2. After Gamzee Makara steals Eridan and Solluxes dead bodies Gamzee prototypes them into a fused Sprite named Erisolsprite

Erisolsprite flipping off Jake

This Sprite is owned by Jake English and the Sprite seems to hate Jake (and literally everything else) as it constantly flips him off.

He has too much self-loathing to live, but is too apathetic to self-destruct, so he's stuck in a state of eternal hatred towards literally everything and everyone.

Act 6 Act 5 Act 2

Before Act 6 Act 5 Act 2 was disconnected from Homestuck and turned into Act 6 Act 5 Act 1 the Erisolsprite made an apperance. After Jake goes into trickster mode Jake asked the Sprite if it wanted to go on adventures with him. The Sprite refused but was then forced to go with him.

Act 6 Act 6 Act 5

During Act 6 Act 6 Act 5, Eridan dead body is seen transforming into a ghost and entering the afterlife. There he found Sollux, Aradia, and Feferi greeting him and becoming his friends. (Which is what Eridan mostly wanted more than anything else (possibly excluding killing all the land-dwellers).