[One of Iris' skills is seeing the best in people. She's already decided that Heather is a good person, killer or no. She knows her sister and Heather are not the same, and she trusts Heather, not only because she seems nice, but also because she is a close friend to Phoenix. Although it's a naive approach, Iris would probably go insane if she didn't believe in the goodness in people's hearts.]
Friends are wonderful, aren't they? It's so nice having so many here.
[video]
Friends are wonderful, aren't they? It's so nice having so many here.