Konan can be found in the redemption shop and offers the frags without the chance. It takes time but it is possible. Saving seal scrolls never hurts, I recommend looking for a team you want to aim for and strive towards it. Always make the most out of rebates, which is earning rewards for what you are doing. There are seal specific events like Recruitment feedback that earns you seals for using seals XD

~Jib