Aurora collaborated with several producers including Odd Martin Skålnes, Magnus Skylstad, Nicolas Rebscher, Alf Lund Godbolt, and Electric during its recording.

All My Demons Greeting Me as a Friend has been described predominantly as an electropop album, along with folk, electronic, synth-pop, Nordic-folk, and alternative pop that explores fantasy, heartache, life, and death through its lyrics.

Her cover of the song "Half the World Away" by Oasis was released for the 2015 John Lewis Christmas advert and included in the album's deluxe edition.

"[4] In a few hours, both songs received thousands of visits in Norway, which earned Aurora some recognition in her country, in addition to a fan base on Facebook.

[12] In early 2016, Aurora featured in British band Icarus' song "Home" and released a cover of David Bowie's "Life on Mars" for the HBO Girls television series.

[28][17] The productions of the record has been characterised as "minimalist" with spacy electronics, pulsating beats, yearning modalities, and synth-driven sounds.

[20][17][30] Critics compared the record to the music of artists like Björk, Lorde, Lykke Li, Florence Welch, Goldfrapp, and Enya.

[30][32] The second track, "Conqueror", is a synth-pop and electropop song that features "clattering drum beats building towards a euphoric chorus".

[23][33][18] The track has been described to be "poppy" and "playful", musically upbeat with a catchy percussive beat, sparkling synths, and a battle-ready chorus.

[23][19] The eighth track, "Warrior" has an upbeat uptempo sound that showcases the brighter side of the record with a vulnerable and authentic self-love inspired message.

[21] Ninth track, "Murder Song (5, 4, 3, 2, 1)" is a solemn and shimmering ballad with a "creeping" title that has a smooth and synthy minor.

[26] "Black Water Lilies" features extended notes, reverberating piano, and simple beats, about "overcoming forces both in the natural and mental realms".

During that time, she revealed that some of the songs were "less dreamy" and "more happy" in comparison to previous ones and concluded that "it's not just a sad and dark record, there is some hope in it [...] which is nice!

She performed at the 2015 Nobel Peace Prize Concert,[41] saying that she and her family "have been following it from the living room at home for many years", and "it is an incredibly beautiful thing to be a part of.

[48] Writing for Entertainment Weekly, Madison Vain commended Aurora's vocals and production and added that the record "channels a similar magical vibe as the art-pop superstar [Björk]".

[53] All My Demons Greeting Me as a Friend debuted at number one on the Norwegian VG-lista Topp 40 Album with first-week sales of 4,800 units, topping the chart for 2 consecutive weeks.