The main characters in the "One Thought of Eternity" included Bai Xiaochun, Du Lingfei, Hou Xiaomei, Gongsun Wan 'er, Song Junwan, Zhou Zimo, Ghostmother, and many others. Bai Xiaochun was the male lead, the disciple of Li Qinghou of the Spirit Stream Sect. He had ignited spirit incense and entered the path of Immortal cultivation, eventually becoming a sovereign who could rival the Mortal Renegade. Du Lingfei was the daughter of the Celestial, and one of the female leads. She eventually became a demigod. Hou Xiaomei, Gongsun Wan 'er, Song Junwan, and Zhou Zimo were also important characters in the story. The detailed introduction of the characters and the division of their strength might require further information.
Hellboy isn't from Marvel. He was created by Mike Mignola and is associated with Dark Horse. Marvel has its own distinct roster of characters, and Hellboy isn't among them.
I'm pretty sure Aladna isn't in Marvel Comics. Marvel has a vast array of characters, but this name doesn't seem to be among them. It could potentially be from a lesser-known comic series or a fan-created concept.
Love isn't a specific character. Marvel Comics are filled with heroes and villains, but love is not one of them. It's something that influences the characters' actions and relationships.