Christodoulos Santorinaios is a second year PhD student in the CS Theory group of AUEB, advised by Vangelis Markakis. He has previously received a MSc in Machine Learning and Data Science, and a MEng in Electrical and Computer Engineering from NTUA, working with Dimitris Fotakis. His research spans three main axes: 1) Fair Division where he has mainly worked on EFX allocations for goods/chores (one published paper, one under submission in a major AI venue), 2) Optimisation and Games where he is focused on learning algorithms beyond zero sum games (one manuscript) and 3) Mechanism Design with Predictions. His research is supported by an Archimedes AI PhD Fellowship. Personal webpage: https://santorinaios.github.io/