Sulaf

Sulaf is the het ship between Raf and Sulfus from the Angel's Friends fandom.

Season 1
Raf and Sulfus are respectively an angel and a devil and they know each other when they go to earth for their internship where they will have to respectively learn to guard and tempt humans.

Raf knows nothing of the human world and when she arrives she is terrified for fear of being hit by a truck. Sulfus who is there by chance attends the scene and laughs at her, explaining that unless they take human form, angels and devils are invisible and immaterial on Earth.

Raf who has probably never seen a devil starts chatting with Sulfus who teases her by pretending to want to shake her hand (angels and devils can't touch). The girl is a little annoyed, but then she follows Sulfus' suggestion to go to school as she is already late.

The teacher of angels, Professor Arkhan, explains to Raf that angels and devils must respectively try to convince humans to make good or bad choices, always respecting the free will of the humans assigned to them. Another rule is that angels and devils must respect is that if one of the two is at work the other cannot interfere and to decide who can make the first move the two face each other in a challenge and the first turn will be the winner. Going to the classroom prepared for the challenges, Raf discovers that she and Sulfus have been assigned to the same human, a 14-year-old named Andrea. Sulfus enjoys teasing her and Raf responds in kind. The two then face off in a surfing competition. Raf is on the verge of winning, so Sulfus pretends to drown and Raf rushes to help him forgetting that he cannot touch him and when she takes his hand, she is electrocuted. That goes for the devil too, but since he expected it, he gets back on the surfboard and wins the challenge. Sulfus makes Andrea play video games with him instead of looking after his little sister by making fun of Raf. So Raf starts to watch over the little girl, but in doing so she violates the rule that prohibits her from replacing humans and is reprimanded by Professor Arkhan.

Raf takes the defeat rather badly and losing to Sulfus also comes to cause her a nightmare in which the devil's voice is also present. The blonde is then consoled by other angels with whom she befriends and the other girls promise to help her in the future. As soon as the two meet again they start bickering again.

It is up to Sulfus to decide the rules of the challenge and obviously puts Raf in trouble, but by calling her friends she manages to win angrily of Sulfus.

Sulfus finds it ridiculous how Raf tries to convince Andrea to help a friend of his who is a victim of bullies and doesn't even bother to intervene. This goes back to his detriment, since Andrea does the right thing and therefore he is scolded harshly by Professor Temptel, the teacher of devils.

Raf and Urié later follow their humans to the mall along with her friend Dolce and run into Sulfus and her friend Cabiria, there for the same reason. Immediately the two begin to tease each other and Cabiria comments amused that Raf must find Sulfus nice, which he immediately denies. Since Dolce has wasted time with her friends, her devil rival Kabalé tries to give their human Edward the chance to do an evil deed. Dolce tries to convince him not to, but by breaking the rules, Kabalé convinces the boy to not care about the needs of others and to think only of himself. Dolce is very disappointed and sad at her failure and Professor Arkhan tries to make her understand that it is harder for them than for their rivals, as devils tend to cheat, lie and be treacherous and incorrect. Raf who listens to the teacher's words wonders sadly if Sulfus is like that too.

Fanon
Sulaf is a popular ship; the forbidden and tormented love between an angel and a devil has impressed fans who have dedicated fanart, video and fanfiction to the ship.