You can watch for free on several legal platforms that offer ad-supported viewing. While sites like Gogoanime provide free access, they are unofficial, may host malicious ads, and do not support the original creators. Where to Watch for Free (Legal)
: The 2013 series is available for free on The Roku Channel . AD tv : Offers the first season for free with ads.
: Offers a free trial that includes access to the series. Episode 14 Overviews
Depending on which part of the series you are watching, "Episode 14" refers to different events: Watch Ace of the Diamond - Crunchyroll Watch Ace of the Diamond - Crunchyroll. Crunchyroll
: You can stream the series for free with ads on Crunchyroll .