So what do you want to reset, is it the root password or the password to arkeia?
If you need help resetting the root password, maybe I can be of assistance. All you need to do is to start your computer in single user/rescue/recovery mode. Make a backup copy of the /etc/passwd, open it in an editor of choice and delete whatever is between the first two colons. Save the file and start your computer normally and you should be able to access your root account without need for a password
Should graphical root login be disabled in your install, you can login as another user and enter in gnome-shell/terminal
. Enter no password and this should give your root privileges.
Don't forget to create a new password as soon as possible.