User blog comment:B214/Question and Answers 6/@comment-73.49.228.11-20180415185326

In two of these slash/dog vol 2 pictures(https://aminoapps.com/c/highschool-dxd-koneko-lovers/page/blog/highschool-dxd-universe-slashdog-voulme-2-illustrations/ERVm_jpQfPuJXNGeXb8NJpR6QkZG31VaW4Y), one of these characters is called leni(the girl in the swinsuit(https://www.baka-tsuki.org/project/index.php?title=File:SLASHD%C3%98G_Volume_2_illustration_01.jpg) and this pic here(https://www.baka-tsuki.org/project/index.php?title=File:SLASHD%C3%98G_Volume_2_illustration_03.jpg)). Anyone know who she is, and what's her role in the story? Also why is vali's eyes blue in slash/dog but brown in highschool dxd?