If you visit a care home today, chances are that you will be greeted by a small furry animal. This animal is intended to provide companionship to the older adults living there, especially to people with dementia. However, the animal is not made of flesh and blood but of acrylic, sensors and components -it is a companion robot.A companion robot is a social robot, often in the form of a household pet or a human, created to provide psychosocial support. Today, we are facing societal challenges of an ageing population while the resources to offer care are decreasing. So-called 'welfare technology' is seen as one part of the solution to both support care staff and at times replace care. During the last decade, targeted funds for investments in welfare technology have been available to municipalities in Sweden, where companion robots have become a popular choice to implement in care homes. This thesis explores, through a mixed-methods approach, what happens when companion robots are deployed in care homes for older adults by looking at different perspectives from key stakeholders. Nine studies are presented with decision makers in municipalities, care staff and older adults, as participants, and the studies have primarily been carried out in the field in care homes and activity centres, where both qualitative (observations, workshops, interviews and record keeping) and quantitative data (surveys) have been collected.Linköping University has been much more to me than merely a place of study or employment -it has been a home. It may sound a bit cliché, like something out of a tech startup's LinkedIn page where they never want employees away from their desks, but the truth is, I have often stayed on campus into the wee hours to complete various robot projects that have enriched my life significantly. Over the past decade, I have felt a deep sense of belonging here, truly defining myself within this context. From my early twenties, when I was still figuring out my career path, to my early thirties, where I have begun to find some answers, LiU has been integral to my growth. This university has nurtured me with its environment, its people, and with the challenges I have tackled. I am grateful to have started my journey here and even more so that I stayed to pursue my PhD. But how does one thank a place that has become so deeply a part of who they are? It feels nearly impossible. Throughout the years, my experiences and interactions here have profoundly shaped me and will remain cherished memories forever.So, to all of you, thank you, I will miss you dearly.Tom, you invited me to your group early on as a bachelor student, showed me how to be a researcher in human-robot interaction and inspired me to make the most of it. I am eternally grateful that you believed in me, gave me this opportunity and helped me through all the ups and downs. Thank you. Ericka, you did not hesitate when asked the question if you wanted to be my co-supervisor two years into my PhD. Thank you for all the encouragement, how you challenged my views an...