Chapter 157- Somi Clearsky (Part 3)
If one asked Rin what he thinks about something as strong as the bond between siblings, he would only describe it as 'Unbreakable'. There is simply nothing that can rival the bond of a family and siblings are one of those cases.
No matter whether they were alive or dead, siblings should never forget each other. They share the pain in the toughest times and the happiness of their highest moments. That's why, to a certain extent, Rin understood Emilia's complicated feelings at the moment.