In 2016, Arend and Kiyoshi Takakura were sent by Gavin to rescue Galina Voronina and her team from a Templar strike-team assaulting Erudito's hideout in Argentina. With a helicopter, the two Assassins rescued their fellow Assassins and their Erudito allies and also killed the high-ranking Templar Ortega Sanchez while escaping the island.
In February 2017, Kiyoshi and Arend were in London with Galina and her apprentice My'Shell. During a training session, Galina recieved a call from Charlotte de la Cruz, who reported back on her mission in Hong Kong. Charlotte informed her fellow Assassins that the Abstergo office they raided for intel about the Phoenix Project was empty and that Barindra Mitra's cell was butchered by an unidentified third party.
One month later, outside of an Abstergo office in Berlin, Arend and Galina confronted Heinrich Hart, the informant who told Kiyoshi about Abstergo's Hong Kong office. Seeking answers after their losses in Hong Kong, the angry Assassins threatened Hart in an alleyway. The mole admited that the intel wasn't as solid as he told Kyoshi but that he wasn't responsible for what happened there. After he promised to find useful information, Arend and Galina left, promising to come back for blood if Hart couldn't prove his usefulness.
（这段要改格式）In London, Arend and his fellow Assassins review the media, where a large explosion in Berlin dominates the headlines. Kiyoshi argues that killing 170 people in public doesn't really fit with the Templar ideals, and suggests another faction might be in play. My'Shell reveals that she has a list of Pieces of Eden retrieved from the Hong Kong Abstergo lab, and pulls up an image of the Koh-i-noor. With My'Shell convinced that it is present in the Spanish Civil war, Charlotte straps herself into the makeshift Animus. The machine appears to malfunction, with Charlotte seemingly trapped inside a simulation and unable to be woken. an injured Guernica returns to find the team surrounding the stricken Animus. He is shocked to learn that My'Shell has repaired the machine with unvetted Abstergo parts, and fears that the machine is now compromised. She makes her apologies and leaves, whilst Guernica informs the others that they will need the assistance of Felix Oladele - an Abstergo/Erudito plant based in Montreal whom is familiar with Animus extractions. Arend and Kiyoshi make the flight immediately to Canada, and using a cargo plane perform a halo jump on to the roof of Abstergo Montreal. After working through the few guards present, they reach the office of Oladele - only to find him already slain by a high tech Assassin, the same individual from Hong Kong. The 'Assassin' wounds them both with throwing knives, and throws Arend out the nearest window which he just manages to hang onto. After a few shots from Kiyoshi's gun, the 'Assassin' jumps from the window. Arend and Kiyoshi both make their way back out, both heavily injured. The only way that the 'Assassin' could know where they were headed is if they have a leak either from the Animus or one of their own within the Brotherhood. They then decide then decide to lay low in a safe house.