Ho Yay / Servamp

• Mahiru and Kuro. Their constant bickering aside, it's clear that the two of them do care about each other a lot. Kuro's behavior towards Mahiru also shows some Tsundere traits. And let's not even get started on Mahiru resolving to face Kuro's inner demons for him... Their character CD amps up the Ho Yay even more.
  • A drama CD is announced that will partly focus on them going to watch fireworks together. Fans are already joking that it's a date.
  • Taken to ridiculous levels in a short Q&A section on a promotional page in a magazine, where Kuro describes his ideal marriage partner as someone who gives him a home with a heater and AC, prepares three meals a day and snacks for him, and buys him his favorite expensive cup noodles and the latest games. Mahiru just so happens to do all of that.
  • The anime ED shows them giving each other a high five, but the way it's portrayed makes it look like they're about to hold hands.
• Mahiru and Sakuya, especially on Sakuya's side. He cares about Mahiru a lot and constantly worries about him, and he clearly doesn't want his friend to get hurt even though he can't betray Tsubaki.
  • Taken up a bit in the anime, which shows both of them blushing when Sakuya gives Mahiru his trademark wristband.
• One True Threesome, Mahiru, Kuro and Sakuya.
• Lawless/Hyde and Licht. They hate each other in the beginning, but it lessens with time and they make a perfect team when they bother to work together. They also bicker Like an Old Married Couple... and then there's the fact that Hyde finally got over Ophelia with Licht's help.
• Misono and Tetsu. They make a good team and have shared quite a few moments (such as Tetsu telling Misono he trusts him unconditionally or Misono comforting Tetsu when he lost Hugh). Official art/merchandise often depicts them together too.
• To a lesser extent, Mahiru and Misono, as the former was the latter's first friend and brought him out of his shell. It even gets lampshaded by Sakuya, who accuses Misono of sounding like a jealous wife talking to her husband's lover when he asks Sakuya when and with what intention he approached Mahiru after discovering he's Tsubaki's subclass.
• Crantz and Guildenstern, often as a side pairing to Licht/Lawless as they often act like their parents, with Crantz as the Team Mom and Guil as the Team Dad, respectively.
• Tsubaki and Sakuya. They don't usually get along, but Sakuya owes Tsubaki a lot and is so loyal to him he even sacrificed his friendship with Mahiru for his sake. Also, their interactions are just fun to watch.
• Tsubaki and Berukia. They're nigh inseparable anyway, on top of being extremely compatible by virtue of being Birds of a Feather. Out of the whole team, Berukia also seems to know Tsubaki best.
• Mikuni and Jeje. They may be Vitriolic Best Buds and Jeje may spend the overwhelming majority of the time annoyed at Mikuni's antics, but in the end they still make an incredible team... and then there's the detail of Mikuni referring to his Servamp as "my Jeje."
• Misono and Lily's relationship, which can be seen as a family bond or a Bodyguard Crush.