Loki is a Fairy Tail guild member best known for his aggressive flirting—he's even ranked as the "Mage you want to have as your boyfriend" by the guild's standards. His charm completely disappears the moment he learns someone's a Stellar Spirit mage, which Mirajane suspects stems from a bad past experience with one. She's also mentioned that Loki once tried hitting on Erza and nearly paid with his life for it.
Despite his womanizing reputation, Loki's genuinely interested in Lucy. He pushes through his obvious fear and anxiety around her to help out—he's the one who tracked down her lost keys and saved her from bandits.
Combat-wise, Loki fights primarily with hand-to-hand techniques and relies on a magical ring as his weapon of choice. He's legitimately skilled in close combat, which makes him useful in actual battles even if he's mostly known for his charm offensive.
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