Jenny Sparks is probably the member of the Authority I miss Warren Ellis writing her the most. Jenny’s the Spirit of the 20th Century, and for every century humankind has lived through, there has been a Jenny.
The 20th Century’s Jenny is Jenny Sparks, a foul-mouthed, chain-smoking, bisexual with the power of electricity. Electricity being the biggest innovator of the 20th Century. Jenny can control it, but not create it, and she can also travel along power lines like electricity. She is a protector of humanity.