In this task, you're given a story (which contains five sentences only). Your task is to find all the characters which are available in the given story.

Sentence1: Louisa was nervous to start her first day at a new school. Sentence2: As she entered the school building she felt uneasy. Sentence3: She was afraid she wouldn't make any friends. Sentence4: Thankfully a nice girl Tina reached out and invited her to lunch. Sentence5: Louisa was happy to make a new friend.
Louisa, Tina