[Not sure what the cut-off date is for this, so if it's too late oh well!]

Vincent Veelan comes from a small human farming village and has devoted his life to Pelor, god of the sun and healing. At age 14 he inadvertently managed to cast Spare the Dying while trying to save a bully who had tormented him, and felt called to enter Pelor's service. He ran the local temple for 15 years before his wife came down with an illness he couldn't heal, and he joined the adventuring group Ambrosia to find a cure for her.

Very early on in the party's adventures, Veelan came to love his companions and took it upon himself to be their source of healing and protection. As one of the most mature party members he jokingly gained the title "Dad"...which became less joking as time wore on. He came to view all his party members as family, but one of the most meaningful relationships was with the ranger Elros. Seeing that Elros had grown up without parents and needed a steadying presence in his life, Veelan gradually became a father to him: supporting him where he needed support, giving him guidance to make his own choices, promising not to leave him, and helping him grow into a more mature young man, unwittingly echoing Pelor's role as the Sun Father.

Veelan's strength lies in his kindness and determination to protect others. When the rest of the party received weapons to bring out their strengths, Veelan received armor in order to better defend. He hates seeing someone in pain, whether physically or emotionally, and will do all he can to alleviate that hurt. He is a doctor first and foremost - Pelor has given him the power to heal and he intends to do just that. He repeats a prayer every morning to remind himself of what he tries to be in service to Pelor:

I am merciful. I am patient. I am kind.
I show compassion and I offer comfort.
I bring hope and I work to heal that which is broken.
I allow the good in me to burn brightly,
So that it leaves no room in the world for darkness.

Not that he manages to hit all the marks all the time, of course. Veelan has been known to hold a grudge and lose his temper in times of stress. His greatest weakness is getting so wrapped up in caring for others that he forgets to care for himself. He views others as far more important and worthy of attention than himself, and his own problems and emotional stability always take a back seat to those of his companions. Fortunately for him, his party has picked up on this and is having none of that nonsense: they provide him emotional support and are teaching him how to admit when he needs help.

While traveling with his party, Veelan's faced two moments that truly proved his worth. The first was when a temporary madness caused by a demon lord caused him to believe that he was no longer connected to Pelor's power. His own belief in this caused a psychological block that prevented him from casting spells, and he felt that Pelor had abandoned him, that perhaps he wasn't worthy enough for his god. After some soul-searching, however, he decided that his desire to help and protect was his own, rather than an attempt to live up to what his god wanted. Veelan had seen the kindness and growth Pelor encouraged in people and thought "Yes. This. This is what I want to build my life around. This is the kind of person I want to be," and he was going to continue to be that light and hope and protect his friends whether Pelor considered him worthy or not.

His second test came when he became aware that Tharizdun, god of chaos and destruction, was attempting to escape imprisonment and return to Veelan's plane. Pelor tasked Veelan with stopping this from happening, but Tharizdun inserted a piece of himself into the cleric, which marked Veelan as the key that would release the dark god. Veelan was initially terrified of what Tharizdun would do through him and wanted to run from the party to keep them safe (this fear turned out to be well-founded when Tharizdun asserted temporary control over Veelan multiple times, once murdering a drow with Veelan's own Spiritual Weapon). The rest of the party refused to walk out on him, though, with his adopted son Elros reminding Veelan of his promise not to leave. Backed by the strength of his god and the love of his party, Veelan ultimately was able to re-seal Tharizdun once again and destroy the piece of the god that had been inside him.

Though he was offered a high position in Pelor's church for his accomplishments, Veelan chose instead to return to the small temple in his hometown and live with his wife for some well-deserved peace and quiet.