Lithium

With a wild lion's mane of hair and seemingly endless energy reserves, Lithium takes it upon herself to fix the world, armed just with a little compassion and a positive outlook. An aspiring psychologist (and personality theory addict), she'll figure out what makes anyone tick within moments, or at least she thinks so. Her unbridled optimism and friendly, caring disposition thus make her quite popular in the Table, though she's criticized for a habit of "armchair diagnosing" and occasionally getting intrusive when she thinks someone needs help.
However, as she goes around fixing everyone else's problems, she can often forget about her own or just bear the burden alone, avoiding asking for help. While advocating self care for others, she's struggling with the emotional issues typical of alkali metals in secret, which gets very taxing. Her energy levels aren't quite as endless as it appears, either, actually cyclical in nature. During her high-energy spells, she always has to keep busy and occupied, rarely one to just chill doing nothing - even relaxing must involve SOME sort of activity for her. Conversely though, she'll have periods of time where she seems to burn out and want to do nothing but sleep all day, especially if she's been dealing with difficult issues lately.

Random facts

  She is a huge personality theory nerd -- MBTI, Enneagram, Socionics, temperaments, if you can think of it, she's studied it. Probably the sort that sees cognitive functions everywhere, types people upon first meeting them, runs typology blogs, and likely would wear her type on a shirt.
  The kind of person that could never live without music, she usually has a song playing in the background when doing just about anything. She listens to a wide array of genres but has an especially soft spot for all kinds of rock, from grunge to gothic to alternative and indie.
  She actually has a massive crush on her friend Bromine, though for now she keeps it as a little secret and is cool with a relationship not happening.