Yes, she is at least bi. but i think she is 더 많이 lesbian over the years. in the episode 108 min 17:05 she kinda stutter before asking Lucy his companion to go 검색 in the forest. in addition to other scenes where she "get a taste" (sic) of Lucy's boobs
i can't really say that she's a lesbian but i can speculate that she's bisexual as we can see during the new episodes (after the 1 년 absence especially). that 또는 she's very comfortable around lucy and openly flirts just because it's her personality. either way, she's still a pretty cool character.